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914World.com _ 914World Garage _ GB -6 mufflers in stainless
Posted by: mb911 Aug 8 2017, 07:37 PM
So after all of the testing we have good feed back. The mufflers are quiet as stock and flow a bit better over stock as larger id tubing internally. We still have to tweak the tail pipe locations and may ask for a little assistance with that. I am going to offer 10 of them at 650 for intro pricing and then 900 after that. They will be made 100% of 304 stainless weighs 18lbs, 2.5 dia tail pipe, installation kit will be included, shipping will be extra and to be determined.
Cairo94507(Michael) is 1st on the list so 1 more spot.(deposit )
914forme (Stephen)
Steve ( aka steve;)( deposit)
Live free +drive (jon) (deposit)
Rktmn247 (kent) (deposit)
MEpstein(Mark) doesn't count for group buy
Restore2seater (Pat)(deposit)
Dion
Marv E
Mark Howard.
Jmuriz (Nathan)
Deposits will be 300.
I will post pictures as we progress just as I did with the heat exchangers project with delivery in November.. Please let me know if you have any questions. 
Posted by: 914forme Aug 8 2017, 08:05 PM
PM sent
Posted by: Steve Aug 8 2017, 08:16 PM
I will take one!!
Posted by: live free & drive Aug 8 2017, 08:26 PM
Hi, I will take one to match the heat exchangers.
Jon
Posted by: rktmn247 Aug 8 2017, 11:33 PM
I want one. Thanks!
Posted by: Cairo94507 Aug 9 2017, 06:42 AM
Posted by: mb911 Aug 9 2017, 07:48 AM
Updated the list. Please remember I need pictures of the heat exchangers installed on your cars so I can have pelicanparts add it to their website.
Also deposits can be made by paypal =add 3% or by check. Paypal is mbmcfarland6@ gee mail .com. (Gmail.com) these are good for mfi cars
Posted by: tygaboy Aug 9 2017, 08:02 AM
Ben - I just wanted to offer a big "Thanks!" for being one of those who help enable us to build our dreams.
Being a reliable supplier is no easy feat.
You're on the short list of those who meet my criteria of "if I need/want it and he/they make it, I'm sending my money!"
Thanks again, we couldn't do it with out you and our other well known suppliers. Keep up the awesome work.
(And now that I have you nicely buttered up: I have this LS3 build that needs a custom muffler made.... 
)
Posted by: mb911 Aug 9 2017, 09:09 AM
Ben - I just wanted to offer a big "Thanks!" for being one of those who help enable us to build our dreams.
Being a reliable supplier is no easy feat.
You're on the short list of those who meet my criteria of "if I need/want it and he/they make it, I'm sending my money!"
Thanks again, we couldn't do it with out you and our other well known suppliers. Keep up the awesome work.
(And now that I have you nicely buttered up: I have this LS3 build that needs a custom muffler made....
)I could build you the shell with no inlets but all the internals and you could weld on what you want ? Just a thought.
Posted by: mb911 Aug 10 2017, 05:40 AM
So suprised no one else.. I would love to share with pelican folks but think they would get mad..
Posted by: Steve Aug 11 2017, 09:10 AM
So suprised no one else.. I would love to share with pelican folks but think they would get mad..
Could try Rennlist or 914club.
Posted by: Cairo94507 Aug 11 2017, 11:07 AM
![popcorn[1].gif](style_emoticons/default/popcorn[1].gif)
Posted by: markhoward Aug 11 2017, 11:41 AM
Hi Ben, I'm interested in one. Sent a PM asking about the feasibility of incorporating a short cat on the outlet. Crazy idea probably.. 
Posted by: mb911 Aug 11 2017, 11:56 AM
I think internally would be easier but just my thoughts.
Posted by: wndsnd Aug 11 2017, 07:27 PM
Can you put two center 2" GT style outlets vs. The right side outlet? Will the sound level be the same?
I have already modified my rear valance, but my car is loud.......
Posted by: mb911 Aug 13 2017, 10:33 AM
Can you put two center 2" GT style outlets vs. The right side outlet? Will the sound level be the same?
I have already modified my rear valance, but my car is loud.......
It would just like the factory mods to a sport and it will be louder..
Also deposits are updated..
Posted by: Steve Aug 13 2017, 04:07 PM
I sent a deposit via PayPal and included the 3%
Posted by: mb911 Aug 13 2017, 04:29 PM
I sent a deposit via PayPal and included the 3%
Oops your right wrong person. Corrected now.
Posted by: billh1963 Aug 14 2017, 07:57 AM
I'm in for one if a spot is till available!
Posted by: mb911 Aug 14 2017, 09:00 AM
I'm in for one if a spot is till available!
Yes there is still room.
Posted by: JmuRiz Aug 14 2017, 09:39 AM
MY first time logging on in a week...let me know the timeline to get a definate.
I have an old M&K sport I was going to get modified to a 3-outlet rally muffler.
Would it be possible to get this with addition of the sport tips that can be capped?
Full new would be better than modding an older one right?
Posted by: mb911 Aug 14 2017, 11:28 AM
MY first time logging on in a week...let me know the timeline to get a definate.
I have an old M&K sport I was going to get modified to a 3-outlet rally muffler.
Would it be possible to get this with addition of the sport tips that can be capped?
Full new would be better than modding an older one right?
Nathan
They are 2 different type of mufflers. This one is focused on quiet and slight improvement on stock performance which has proven over the years to be almost unbeatable..
The m&k mufflers are about pure 6cyl porn. They sound intoxicating and build off of that.. Its all about what you're looking for.
Posted by: Dion Aug 14 2017, 09:27 PM
Ben, sent a pm. I'm interested if still able to join in the group buy.
Posted by: mb911 Aug 15 2017, 08:11 AM
Updated did I forget anyone?
I need to get invoices out for the remainder of you that put deposits down.
Posted by: JmuRiz Aug 15 2017, 04:25 PM
What the heck, I'll join the group buy on the last spot. My 3 year old says my not-loud other car is too loud, maybe getting a quieter muffler will make her want to ride when she's 5 and I finish my car 
Posted by: mb911 Aug 15 2017, 05:57 PM
What the heck, I'll join the group buy on the last spot. My 3 year old says my not-loud other car is too loud, maybe getting a quieter muffler will make her want to ride when she's 5 and I finish my car
Sounds good I will add you.
Posted by: Steve Aug 17 2017, 09:51 PM
Ben,
When will you expect the remainder of the payment? Just curious for budgeting purposes.
Posted by: mb911 Sep 25 2017, 01:07 PM
Nothing to much to update other then all drawings are at laser cutter. Expecting parts to be done in 2 weeks give or take so production will start soon..
Posted by: mb911 Sep 25 2017, 01:08 PM
Ben,
When will you expect the remainder of the payment? Just curious for budgeting purposes.
November would be best guess right before shipping.
Posted by: mb911 Sep 29 2017, 07:15 PM
Tail pipe is set now for final fit on Georges car Monday..
Posted by: mb911 Oct 2 2017, 01:48 PM
Ok so minor seatback but have plenty of measurements to correct now.. I tried it on Georges 73 2.7 with a 915 trans and also his orginal six. Tail pipe needs a true 90 and the angle downward about 30 degrees.. 
Posted by: davehg Oct 2 2017, 02:08 PM
Ben, I am in for one.
Posted by: mepstein Oct 2 2017, 02:49 PM
Just drove my 3.2 with an m&k R muffler. Love it but I know my wife will never ride in the car with that exhaust. Well, maybe once if I don’t rev it before she gets in. Keep me on the list for this muffler. 
Posted by: mb911 Oct 2 2017, 03:19 PM
Will do..
Posted by: JOEPROPER Oct 2 2017, 03:30 PM
I'd like to get in on this if it's not too late.
Posted by: live free & drive Oct 2 2017, 04:11 PM
Hi Ben,
What rear cone did the 915 tranny have - stock, Vellios, Wevo etc?
What was the clearance to the muffler?
Jon
Posted by: mb911 Oct 2 2017, 05:54 PM
Vellios..on a gt clone
Posted by: GeorgeRud Oct 2 2017, 08:44 PM
The stock heat exchangers needed a slight elongation (about the width of a muffler flange) to get the stock Leitstriz muffler to fit, but Ben's is slightly smaller in diameter so should fit even with the Vellios tail cone. I think the Wevo 915 sticks too far for any single banana style muffler to fit.
Posted by: Keith914 Oct 2 2017, 10:33 PM
I will buy one for $650 if still available. How can I send the $300 deposit?
Posted by: mb911 Oct 3 2017, 05:33 AM
Everyone that jumped on the past day or 2 I am very willing to make you mufflers but won't be until I finish the group buy folks.. Email me direct at mbconsulting21 at gee mail.com
Posted by: mb911 Oct 30 2017, 07:47 PM
Parts are in from laser cutting and fixture is almost done.. We will start to see progress shortly..
Will have 1 ready this week to ship to someone in the group buy that will install right away to ensure fittment.
Posted by: mb911 Oct 30 2017, 07:56 PM
Posted by: davehg Oct 31 2017, 12:23 AM
How do they sound Ben? Getting excited to see these, even if my engine build is months away from completion.
Posted by: mb911 Oct 31 2017, 05:24 AM
How do they sound Ben? Getting excited to see these, even if my engine build is months away from completion.
They sound almost stock.. That was/is the goal.
Posted by: mb911 Nov 1 2017, 09:29 AM
Posted by: mb911 Nov 1 2017, 09:30 AM
Fixture is done and 1st one is almost done.
Posted by: Steve Nov 1 2017, 11:09 AM
Parts are in from laser cutting and fixture is almost done.. We will start to see progress shortly..
Will have 1 ready this week to ship to someone in the group buy that will install right away to ensure fittment.
I can immediately install it on my car. My car has your heat exchangers.
Posted by: mb911 Nov 2 2017, 01:51 PM
Parts are in from laser cutting and fixture is almost done.. We will start to see progress shortly..
Will have 1 ready this week to ship to someone in the group buy that will install right away to ensure fittment.
I can immediately install it on my car. My car has your heat exchangers.
My only concern with your car is that you run a 915 with the extension s and that may skew the results.. Not that they won't fit the same..
Posted by: Steve Nov 2 2017, 03:07 PM
I agree, no problem. Can’t blame a guy for trying!! Lol
Posted by: mb911 Nov 2 2017, 03:30 PM
I agree, no problem. Can’t blame a guy for trying!! Lol
Its funny I test fit the muffler on Georgeruds car and it has a 915 with modded stock heatexchangers to lengthen the pipes to fit the muffler..
Posted by: Steve Nov 2 2017, 05:25 PM
I agree, no problem. Can’t blame a guy for trying!! Lol
Its funny I test fit the muffler on Georgeruds car and it has a 915 with modded stock heatexchangers to lengthen the pipes to fit the muffler..
Was it a wevo 915 kit tail shifter? There much worse than mine. Mine is a Martin Bott 916 side shifter. Mine still requires extra clearance, but the Wevo 915 guys typically run short headers with dual mufflers.
http://www.patrickmotorsports.com/project/916-porsche-38l-motec-slide-valve-w-915-5-speed/#image_9
or a very skinny M&K muffler.
Posted by: mb911 Nov 2 2017, 06:14 PM
It is the vellios kit.
Posted by: Steve Nov 2 2017, 06:52 PM
The velios is also a side shifter, so it should be the same as mine.
Posted by: mb911 Nov 3 2017, 05:13 AM
Yup thats what I thought.
Posted by: GeorgeRud Nov 3 2017, 09:06 AM
The Vellios rear transmission cover requires a small spacer to clear a stock muffler (about the width of a flange is all), but the Wevo tail piece is much more intrusive. The Martin Bott system should be similar to the Vellios I would think.
Posted by: Steve Nov 3 2017, 09:34 AM
The Vellios rear transmission cover requires a small spacer to clear a stock muffler (about the width of a flange is all), but the Wevo tail piece is much more intrusive. The Martin Bott system should be similar to the Vellios I would think.
The vellios and Martin bott rear cover are both patterned off of the 916 rear cover. However I haven’t seen a reverse switch on a vellios. I have one on mine and it does stick out about an inch.
Posted by: GeorgeRud Nov 3 2017, 09:55 AM
No reverse switch on the Vellios. However, even without one, it does slightly interfere with a stock muffler.
Posted by: live free & drive Nov 3 2017, 11:56 AM
Would it be possible to have added 1 1/2" to 2" to the inlet pipes for people (like me, among others) who are running a 915 trans?
Maybe for an upcharge you could provide the modification vs. having to insert/create spacers?
I'm working on a 3.2 with a 915 and your HE's - I have a Vellios tail-cone, but currently have installed a stock tail-cone (with reduced features) and the PMS steel adapter frame. From my measurements the Vellios tail-cone is about 3/4" shorter than the stock tail-cone casting (measured including nothing beyond the casting surface) so I'm assuming it's going to interfere with the muffler.
Posted by: mb911 Nov 4 2017, 07:09 AM
Would it be possible to have added 1 1/2" to 2" to the inlet pipes for people (like me, among others) who are running a 915 trans?
Maybe for an upcharge you could provide the modification vs. having to insert/create spacers?
I'm working on a 3.2 with a 915 and your HE's - I have a Vellios tail-cone, but currently have installed a stock tail-cone (with reduced features) and the PMS steel adapter frame. From my measurements the Vellios tail-cone is about 3/4" shorter than the stock tail-cone casting (measured including nothing beyond the casting surface) so I'm assuming it's going to interfere with the muffler.
Its possible..
The problem is that almost every order I had on the group buy wanted something special or custom and it makes very hard to break even on the project when I finish everything up..
That said its possible on this to do the upcharge as you describe.
Posted by: Steve Nov 4 2017, 10:32 AM
Would it be possible to have added 1 1/2" to 2" to the inlet pipes for people (like me, among others) who are running a 915 trans?
Maybe for an upcharge you could provide the modification vs. having to insert/create spacers?
I'm working on a 3.2 with a 915 and your HE's - I have a Vellios tail-cone, but currently have installed a stock tail-cone (with reduced features) and the PMS steel adapter frame. From my measurements the Vellios tail-cone is about 3/4" shorter than the stock tail-cone casting (measured including nothing beyond the casting surface) so I'm assuming it's going to interfere with the muffler.
Its possible..
The problem is that almost every order I had on the group buy wanted something special or custom and it makes very hard to break even on the project when I finish everything up..
That said its possible on this to do the upcharge as you describe.
2” would be awesome. Maybe standardize on a 915 version and make a bunch of them.
Posted by: davehg Nov 4 2017, 05:41 PM
Updated did I forget anyone?
I need to get invoices out for the remainder of you that put deposits down.
I should be on your list - paypal payment sent in full
Posted by: mb911 Nov 4 2017, 06:17 PM
Updated did I forget anyone?
I need to get invoices out for the remainder of you that put deposits down.
I should be on your list - paypal payment sent in full
You are but not part of the group buy.. The buyers in front of you are 1st to have product delivered..
Posted by: mb911 Nov 9 2017, 06:43 PM
Finishing 1st one this weekend and need to ship next week to the 1st person that can test fit right away on there 901 based trans -6 and confirm everything is good .. We will build the bulk of the muffler body's next week and wait for confirmation of fitment before welding on tail pipes..
Posted by: mb911 Nov 12 2017, 12:32 PM
So I will have the 1st one ready to ship tomorrow.. Who can try one right away?
Posted by: mb911 Nov 13 2017, 07:35 PM
1st on goes out to stephen tomorrow.
Posted by: mb911 Nov 14 2017, 10:19 AM
Also still have to work out a 911 style muffler hanging installation setup. These mufflers should not be supported just from the inlets..
Posted by: mepstein Nov 14 2017, 10:52 AM
Mine is sort of rigged up the 2.0 hanger. I would like something that looks good and works correctly.
Posted by: GeorgeRud Nov 15 2017, 12:09 PM
Though not elegant, an extra flange between the heat exchanger and the muffler with extra gaskets would provvbably be the easiest way to obtain any needed clearance. Much easier than modifying the mufflers or heat exchangers for those few folks that need this. I wonder how many folks are actually running 915 transmissions in their cars?
Posted by: Steve Nov 15 2017, 01:23 PM
For me and my Martin Bott 916 kit a 2” spacer would be perfect. I agree.. extending the pipes on the muffler will hurt the resale value for cars that don’t need the clearance. Ben made me 1.5” spacers that work, but I had to use studs versus bolts, due to limited space between the flanges on the spacer.
Posted by: mb911 Nov 15 2017, 03:06 PM
Steve once you get the muffler we will have to look at options for a 911 style support..
Posted by: Steve Nov 15 2017, 05:19 PM
Some of the other local six conversions are using a log type muffler that use the straps around the muffler versus the hanger. I will find out how they made it.
Posted by: mb911 Nov 21 2017, 06:57 AM
Steve should have received his last night.. Once we get updates we will be ready to start shipping the rest..
Posted by: Steve Nov 21 2017, 08:30 AM
I received it last night at 8pm. Amazing workmanship! I will try to install it in the next couple of days depending on work schedule. I will post a bunch of pictures. I also have an old MSDS single exit muffler that I will compare the exit pipe with, since my Triad exhaust tips have been modified.
Posted by: mb911 Nov 21 2017, 05:34 PM
I received it last night at 8pm. Amazing workmanship! I will try to install it in the next couple of days depending on work schedule. I will post a bunch of pictures. I also have an old MSDS single exit muffler that I will compare the exit pipe with, since my Triad exhaust tips have been modified.
Great news.. We have all the internals done for the rest of the mufflers just need a final approval for tail pipes..
Posted by: Steve Nov 21 2017, 10:29 PM
I received it last night at 8pm. Amazing workmanship! I will try to install it in the next couple of days depending on work schedule. I will post a bunch of pictures. I also have an old MSDS single exit muffler that I will compare the exit pipe with, since my Triad exhaust tips have been modified.
Great news.. We have all the internals done for the rest of the mufflers just need a final approval for tail pipes..
Bummer... but it's off. This is with no spacer.
Posted by: Steve Nov 21 2017, 10:31 PM
This is with an old MSDS single exit muffler for comparison.
Posted by: mb911 Nov 22 2017, 07:00 AM
That is a bummer.. Wow .. Its way off.. Ugh..we will get that corrected..
Posted by: mb911 Nov 22 2017, 07:01 AM
Looks like tail pipe diameter off..
Posted by: mepstein Nov 22 2017, 07:38 AM
It would work for me, I don’t run a rear valance.
Posted by: Steve Nov 22 2017, 08:37 AM
Looks like tail pipe diameter off..
It looks like it needs to move over exactly 2” to the right. It’s still on the car if you want me to take more measurements or pictures. Otherwise I can take it off and send it back. I didn’t start the car up.
Something else interesting... I did not use my 1.5" spacer. There was enough clearance without it. However... The muffler is exactly 1.5" from the rear heat shield. I am curious how this will effect WEVO installations, since they typically require a 2" extension since they are a tail shifter.
Posted by: Krieger Nov 22 2017, 09:05 AM
I have seen a couple of ways to support the muffler I took of this site. I do not know which one of the guys did this. Sorry. I did make a similar copy.
Attached image(s)
Posted by: Krieger Nov 22 2017, 09:07 AM
This was from the fellow in Europe who recently hand built his 904 replica.
Attached image(s)
Posted by: Steve Nov 22 2017, 09:22 AM
I bought a factory 911 muffler bracket. It wouldn't be that hard to add a cross brace and re-drill the holes for it. I would put it on top of the stock header bracket.
Posted by: Krieger Nov 22 2017, 09:28 AM
Here is my unpainted homebrew version. If you look carefullly you will see were my 40 year old muffler shell needed to be rewelded to the pipe. Did it separate because of age or since it was not supported?
Attached thumbnail(s)
Posted by: Steve Nov 22 2017, 10:04 AM
It would work for me, I don’t run a rear valance.
Something else interesting... I did not use my 1.5" spacer. There was enough clearance without it. However... The muffler is exactly 1.5" from the rear of the heat shield. I am curious how this will effect WEVO installations, since they typically require a 2" extension since they are a tail shifter. Maybe you could modify the heat shield. My car is also a 75. I know the heat shields were different on earlier cars.
Here's a picture of the 3.6 914-6 in Excellence. It used 2" spacers with an M&K muffler and a Wevo 915 trans. I think the M&K muffler is a thinner muffler??
Posted by: mb911 Nov 22 2017, 10:50 AM
Looks like tail pipe diameter off..
It looks like it needs to move over exactly 2” to the right. It’s still on the car if you want me to take more measurements or pictures. Otherwise I can take it off and send it back. I didn’t start the car up.
Something else interesting... I did not use my 1.5" spacer. There was enough clearance without it. However... The muffler is exactly 1.5" from the rear heat shield. I am curious how this will effect WEVO installations, since they typically require a 2" extension since they are a tail shifter.
I may have you send it to Mark.. otherwise it will work for a later 911 as well and I think I have one customer waiting on that..
Steve please confirm everything else is correct for height and angle and just moving to the right closer to the muffler by 2" will do whats needed.. Once we know that I will send you another one with corrected tail pipe..
let me know or text me later today
Posted by: mb911 Nov 22 2017, 10:51 AM
It would work for me, I don’t run a rear valance.
Something else interesting... I did not use my 1.5" spacer. There was enough clearance without it. However... The muffler is exactly 1.5" from the rear of the heat shield. I am curious how this will effect WEVO installations, since they typically require a 2" extension since they are a tail shifter. Maybe you could modify the heat shield. My car is also a 75. I know the heat shields were different on earlier cars.
Here's a picture of the 3.6 914-6 in Excellence. It used 2" spacers with an M&K muffler and a Wevo 915 trans. I think the M&K muffler is a thinner muffler??
both mufflers are 6" diamter
Posted by: Steve Nov 22 2017, 12:06 PM
Then it should work fine with a Wevo 915, but might have to modify the heat shield. Here is a shot of the rear clearance with no spacers using your heat exchangers.
Moving the tail pipe 2" to the right should be perfect for my car. The angle and height seems fine.
Posted by: mepstein Nov 22 2017, 12:21 PM
Looks like tail pipe diameter off..
It looks like it needs to move over exactly 2” to the right. It’s still on the car if you want me to take more measurements or pictures. Otherwise I can take it off and send it back. I didn’t start the car up.
Something else interesting... I did not use my 1.5" spacer. There was enough clearance without it. However... The muffler is exactly 1.5" from the rear heat shield. I am curious how this will effect WEVO installations, since they typically require a 2" extension since they are a tail shifter.
I may have you send it to Mark.. otherwise it will work for a later 911 as well and I think I have one customer waiting on that..
Steve please confirm everything else is correct for height and angle and just moving to the right closer to the muffler by 2" will do whats needed.. Once we know that I will send you another one with corrected tail pipe..
let me know or text me later today
Take care of your real customers first.
Posted by: mb911 Dec 3 2017, 06:34 PM
So long story short. Steve received the 1st one and as you can tell tail pipe was in wrong location. Steve's buddy Keith found out and worked out a deal and installed it on his car.. From what I have been told there are some very positive results.. Boxes are ordered and here ready to ship mufflers.. Mufflers will be shipping starting this week amd all will be shipped by the following week. Thanks again everyone for your patience..
Posted by: mb911 Dec 4 2017, 10:21 AM
A quick shot of today's shipment
Posted by: Steve Dec 8 2017, 09:04 PM
When are these going to ship?
Posted by: mb911 Dec 8 2017, 09:10 PM
We will ship this coming week.. Had some hang ups this week.. Just took longer then anticipated..
Posted by: 914dave Dec 10 2017, 09:12 AM
I took a sock muffler bracket and welded the upper support on and use spring tensioned muffler clamps. Its just 1/8' or 3.175 mm thick material welded to the bracket and then heated and bent to the form of the muffler
Posted by: mb911 Dec 10 2017, 09:50 AM
I was talking with Eric Shae about it and he mentioned the GT style hanger?? Not sure but I heard they worked well.
Posted by: mepstein Dec 10 2017, 12:26 PM
I was talking with Eric Shae about it and he mentioned the GT style hanger?? Not sure but I heard they worked well.
That’s what I need.
Posted by: porschetub Dec 10 2017, 05:59 PM
This was from the fellow in Europe who recently hand built his 904 replica.
That's the one I have started to make ,I want to get rid of the normal hanger support
if the stock muffler (heavy) is supported on its own should be fine ,my headers are very solid.
BTW nice work on the mufflers Ben ,do you intend to go into production ?.
Posted by: mb911 Dec 10 2017, 06:39 PM
This was from the fellow in Europe who recently hand built his 904 replica.
That's the one I have started to make ,I want to get rid of the normal hanger support
if the stock muffler (heavy) is supported on its own should be fine ,my headers are very solid.
BTW nice work on the mufflers Ben ,do you intend to go into production ?.
Yes these will be a stock item moving forward..
Posted by: mepstein Dec 10 2017, 07:00 PM
This was from the fellow in Europe who recently hand built his 904 replica.
That's the one I have started to make ,I want to get rid of the normal hanger support
if the stock muffler (heavy) is supported on its own should be fine ,my headers are very solid.
BTW nice work on the mufflers Ben ,do you intend to go into production ?.
I agree, your headers are solid. Do you think the headers being that strong and the additional weight of the heater boxes might put more stress on the exhaust studs. The hanger would help to eliminate movement at the ends that might torque the flanges.
Posted by: mb911 Dec 11 2017, 06:00 AM
I feel the best solution is to hang them just like a 911 would. This would eliminate any stress on the studs and less likely to break anything..
Posted by: mb911 Dec 12 2017, 01:55 PM
Ready to boxed and shipped.
Posted by: mb911 Dec 14 2017, 06:37 AM
All the mufflers are being shipped today except one. We believe that there will fit as intended. Please note that the stainless is very soft until heat cycled so things will move around during install. This also allows for tweaks if need be..
Posted by: Dion Dec 14 2017, 08:33 AM
Excellent, This makes a great Christmas present! Thanks Ben.
Posted by: mb911 Dec 14 2017, 01:40 PM
Excellent, This makes a great Christmas present! Thanks Ben.
I am happy to have them completed. Laser cutting etc took forever and allot of back and forth on fitting..
Now next project engine sheet metal..
Posted by: Dion Dec 14 2017, 02:34 PM
One question Ben. Where the hell do you find the energy and motivation? Cause if your
interested in selling some I’m in. Hehehe.
Good on ya!
Posted by: mb911 Dec 14 2017, 04:31 PM
Dion,
Just trying to fill a small niche.. Engine sheet metal non oem is needed. The RD stuff is wonderful but I can't afford it.
Posted by: davehg Dec 15 2017, 12:01 AM
Dion,
Just trying to fill a small niche.. Engine sheet metal non oem is needed. The RD stuff is wonderful but I can't afford it.
Would love a set of engine tins for the 2.7! Powder coated black please!!!
Posted by: 11tenths Dec 15 2017, 03:09 PM
914/6 GT muffler support bracket- the final touch to your excellant product (and all the other 6 conversions using porsche-style mufflers- cha-ching!)
Thanks to PBase.com's great resource:
http://www.pbase.com/9146gt/image/23484694
-Harry
Posted by: porschetub Dec 15 2017, 05:08 PM
914/6 GT muffler support bracket- the final touch to your excellant product (and all the other 6 conversions using porsche-style mufflers- cha-ching!)
Thanks to PBase.com's great resource:
http://www.pbase.com/9146gt/image/23484694
-Harry
great part for Ben to make,however where do you find a pattern for this very rare item 
.Posted by: porschetub Dec 15 2017, 05:42 PM
This was from the fellow in Europe who recently hand built his 904 replica.
That's the one I have started to make ,I want to get rid of the normal hanger support
if the stock muffler (heavy) is supported on its own should be fine ,my headers are very solid.
BTW nice work on the mufflers Ben ,do you intend to go into production ?.
I agree, your headers are solid. Do you think the headers being that strong and the additional weight of the heater boxes might put more stress on the exhaust studs. The hanger would help to eliminate movement at the ends that might torque the flanges.
Don't have heaterbox's and my headers are made of heavy wall tubing,the 914/6GT bracket worked for that car and I think it a good setup.
Posted by: Larmo63 Dec 15 2017, 07:27 PM
There was a very talented member here who supplied mine. I don't know if he is still making them. 
Posted by: 11tenths Dec 15 2017, 11:11 PM
I believe you're referring to "He of the wrinkled pastel shirt": Eric.
The brackets and those expensive Geze clamps were briefly listed in PMB's catalog several years ago.
-Harry
Posted by: mb911 Dec 16 2017, 07:03 AM
I believe you're referring to "He of the wrinkled pastel shirt": Eric.
The brackets and those expensive Geze clamps were briefly listed in PMB's catalog several years ago.
-Harry
Yes Eric told who made them and the gentleman is no longer interested in making them.
Posted by: live free & drive Dec 16 2017, 08:40 AM
This other page on AJ's P-Base site gets a bit closer to the part needed:
http://www.pbase.com/9146gt/rally_muffler_of_a_gt_mounting_bracket_reproduction
Jon
Posted by: mb911 Dec 16 2017, 09:28 AM
Looks really easy if I had dimensions I could make one.
Posted by: GeorgeRud Dec 16 2017, 09:58 AM
There is a photo showing the dimensions on phases site, but it’s too fuzzy to make out the dimensions. A higher resolution picture would clearly show the actual dimensions.
Posted by: Cairo94507 Dec 16 2017, 09:59 AM
I have always liked that GT muffler strap look. I may have to have one of those kits in the event I order another muffler in the GT option......you never know.
Posted by: mb911 Dec 16 2017, 12:04 PM
I might mess with a version of this over the next few weeks.. I need to get a factory mount for the muffler then just extrapolate the info for a bracket..
Posted by: 11tenths Dec 16 2017, 12:25 PM
Ben- you should make this a term project for your students...
-HB
Posted by: mb911 Dec 16 2017, 01:46 PM
Ben- you should make this a term project for your students...
-HB
Lol not gonna do that conflict of interest.. But I will build some.. Gotta a guy full time now.
Posted by: porschetub Dec 16 2017, 01:52 PM
This other page on AJ's P-Base site gets a bit closer to the part needed:
http://www.pbase.com/9146gt/rally_muffler_of_a_gt_mounting_bracket_reproduction
Jon
Wow thanks for that ,been on AJ's site many times and missed that,rather simple design and easy to make...excellent
.
Posted by: Steve Dec 17 2017, 10:00 PM
Spent the day installing my new muffler. Multiple trips to the hardware store to jury rig a 911 muffler hanger onto my 914-6 muffler hanger. It's good enough for now. If someone makes something better, I will swap it out.
Posted by: mb911 Dec 18 2017, 04:43 PM
Happy to see one mounted up and on..
Posted by: Dion Dec 18 2017, 05:15 PM
It’ll be spring before I get to hear this sing!
But, just want to say thanks Ben.
Nice craftsmanship. Chomping at the bit now...
Attached thumbnail(s)
Posted by: mb911 Dec 19 2017, 05:30 PM
It’ll be spring before I get to hear this sing!
But, just want to say thanks Ben.
Nice craftsmanship. Chomping at the bit now...
Glad it made it there safely.
Posted by: GeorgeRud Dec 19 2017, 08:40 PM
I worry whether the extended studs on the muffler hanger might cause the transmission tailpiece to eventually crack at their insertion boss. Though most of the weight is held by the muffler hanger, the weight at the top may be a concern. The muffler and exhaust extensions look great.
Posted by: campbellcj Dec 20 2017, 08:06 AM
I have an earlier product of Ben's which spends time on my '914R' car when it's not running open megaphones for track. I've been using the stock (AA repro specifically) type hanger bracket and would not recommend simply hanging this big can off your headers/exchangers with no support.
I'd rather have a better setup more -6/GT specific and am interested in anyone sourcing or reproducing those parts. My car is running 'long' headers though not the shorter GT type which use an extension to attach a muffler.
FWIW I also had the area on the muffler where the inlet pipes enter the 'can' reinforced as a precaution.
Posted by: mb911 Dec 22 2017, 11:01 AM
Ordered a 2.0 bracket yesterday so I can mock up a GT style mount.. Will get some done asap.
Posted by: Cairo94507 Dec 22 2017, 11:56 AM
OK - I guess I am just not hitting on all cylinders here. A stock Six muffler attaches at the heat exchanger flanges and all that supports it are the 4 bolts, right? Ben's muffler should be much lighter in stainless steel than a stock muffler -I think. Are the GT straps more for additional safety? Are they really needed on a street driven car? Personally, I really like the looks of the 2 straps on the muffler....but is it necessary?
Additionally, I believe we will be ceramic coating my (Ben's) heat exchangers and muffler - to make them appear a bit more "stock" than the SS finish. At least that is what we are talking about.
Posted by: mb911 Dec 22 2017, 12:11 PM
OK - I guess I am just not hitting on all cylinders here. A stock Six muffler attaches at the heat exchanger flanges and all that supports it are the 4 bolts, right? Ben's muffler should be much lighter in stainless steel than a stock muffler -I think. Are the GT straps more for additional safety? Are they really needed on a street driven car? Personally, I really like the looks of the 2 straps on the muffler....but is it necessary?
Additionally, I believe we will be ceramic coating my (Ben's) heat exchangers and muffler - to make them appear a bit more "stock" than the SS finish. At least that is what we are talking about.
Stainless can work harden and just feel it best if supported like a 911
Then no breaking..
Michael make sure you test fit everything before coating. Once its coated its hard to change anything.
Posted by: Cairo94507 Dec 22 2017, 02:23 PM
Good point. Will do.
Posted by: 11tenths Dec 22 2017, 03:50 PM
The Leistritz sport muffler on my 6 conv was starting to crack where the tubes joined the can- think of the leverage at that point with 'spirited' driving.
Personally, I'm looking forward to "Ben's Bracket".
Cheers- Harry
Posted by: Steve Dec 22 2017, 05:05 PM
My muffler extension is 1.5”. I needed that much clearance for the previous Triad muffler. With this muffler I only need a 1/2” to clear the back up light switch on my 916 gearbox. I ordered a couple of muffler flanges, to replace the 1.5” spacer. With that setup I should be able to move the muffler mount and straps closer to the trans for a more solid setup.
Posted by: Steve Jan 2 2018, 09:36 AM
Update for people that might use this muffler with Martin Botts 916 kit. I replaced the 1.5" spacer with a 3/8" flange. Between the 3/8" flange and gasket, I moved the muffler back an inch towards the trans. I only needed a 1/2" to clear the backup light switch on the Martin Bott 916 trans cover. The upper muffler mount is now also much stronger.
The exhaust pipe still exits the valence good enough. I might change my mind someday and add a chrome tip.
Posted by: 914Toy Jan 2 2018, 09:49 AM
Update for people that might use this muffler with Martin Botts 916 kit. I replaced the 1.5" spacer with a 3/8" flange. Between the 3/8" flange and gasket, I moved the muffler back an inch towards the trans. I only needed a 1/2" to clear the backup light switch on the Martin Bott 916 trans cover. The upper muffler mount is now also much stronger.
The exhaust pipe still exits the valence good enough. I might change my mind someday and add a chrome tip.
Looking good
Posted by: mb911 Jan 2 2018, 06:30 PM
Looks good.. Now I need to market them..
Posted by: Cairo94507 Jan 3 2018, 09:41 AM
Count me in for one please Ben. Definitely don't want to see any cracks in that beautiful muffler.
Posted by: campbellcj Jan 5 2018, 05:32 PM
FWIW here's a pic showing the stainless reinforcements my mechanic added as a precaution several years ago. Vibration and heat are constant threats to reliability and durability, as this is a very stiff, high-revving track car with obviously some parts being 45 years old now.
Posted by: mb911 Mar 6 2018, 09:56 AM
Here is the bracket finally.. Gotta get them laser cut and its just slipped in there for the pictures but works just fine for band straps to fit around. 
Posted by: mb911 Mar 6 2018, 09:57 AM
Posted by: mepstein Mar 6 2018, 10:08 AM
Great!
Posted by: Dion Mar 6 2018, 10:47 AM
Oh yes! Count me in for one of those. Very nice.
Posted by: Steve Mar 6 2018, 11:20 AM
Me too!! I’m guessing we won’t need the stock muffler/header hanger if we use this one?
Posted by: mb911 Mar 6 2018, 11:25 AM
Me too!! I’m guessing we won’t need the stock muffler/header hanger if we use this one?
Correct..
Posted by: JmuRiz Mar 6 2018, 01:41 PM
Looks great, I'm in for one too!
Posted by: Luke M Mar 6 2018, 05:08 PM
Hi Ben,
Would the ss bracket fit the factory muffler or just yours ?
Posted by: mb911 Mar 7 2018, 06:38 AM
Hi Ben,
Would the ss bracket fit the factory muffler or just yours ?
Good question. I am not sure. I built them for my mufflers and don't have an oem one to try it on.. I could easily make them for the oem mufflers as well though.
Posted by: 11tenths Mar 7 2018, 09:20 AM
Hi Ben,
Would the ss bracket fit the factory muffler or just yours ?
Good question. I am not sure. I built them for my mufflers and don't have an oem one to try it on.. I could easily make them for the oem mufflers as well though.
Now we're talkin'!
Much bigger market IMHO...
- Harry
Posted by: mb911 Apr 4 2018, 10:07 AM
Brackets will be ready early next week. Will powdercoat black. There will be a light weight one for 35 and heavy duty 45.
Posted by: mepstein Apr 4 2018, 01:01 PM
Brackets will be ready early next week. Will powdercoat black. There will be a light weight one for 35 and heavy duty 45.
2 questions - Are they stainless steel. Do you have a good source for straps.
Posted by: mb911 Apr 4 2018, 03:12 PM
Brackets will be ready early next week. Will powdercoat black. There will be a light weight one for 35 and heavy duty 45.
2 questions - Are they stainless steel. Do you have a good source for straps.
Not stainless and the straps from mcmaster just like m&k uses will be perfect.
Posted by: mepstein Apr 4 2018, 03:40 PM
Brackets will be ready early next week. Will powdercoat black. There will be a light weight one for 35 and heavy duty 45.
2 questions - Are they stainless steel. Do you have a good source for straps.
Not stainless and the straps from mcmaster just like m&k uses will be perfect.
Cool. I did not know where to get the straps for reasonable money.
Posted by: mb911 Apr 4 2018, 03:45 PM
Brackets will be ready early next week. Will powdercoat black. There will be a light weight one for 35 and heavy duty 45.
2 questions - Are they stainless steel. Do you have a good source for straps.
Not stainless and the straps from mcmaster just like m&k uses will be perfect.
Cool. I did not know where to get the straps for reasonable money.
I can order a bunch if everyone wants a set? Just have to figure out who is all in. The brakets are cut but need to be welded and powdercoated.
Posted by: Steve Apr 4 2018, 07:56 PM
I already bought the straps from M&K. I’m just interested in the bracket.
Posted by: campbellcj Apr 8 2018, 08:06 AM
I'm definitely in for a set of bracket+straps if a kit or GB comes to be!
Posted by: mb911 Apr 8 2018, 08:26 AM
Brackets are ready for me to weld .. Maybe today..
Posted by: mb911 Apr 13 2018, 03:20 PM
Brackets are done and sitting at powdercoater.. I will pick up Monday and start shipping. Lets call it $44 shipped anywhere usps flat rate works.. Paypal is best method. I can provide the part number for the straps but I don't have any in stock. .
Thanks
Posted by: Steve Apr 13 2018, 09:21 PM
PayPal sent
Posted by: mb911 Apr 16 2018, 01:25 PM
Brackets back from paint.
Posted by: Steve Apr 17 2018, 07:59 AM
Paypal sent, but no hurry on mine. I already jury rigged a stock 911 muffler bracket.
Posted by: Steve Apr 23 2018, 08:50 AM
Just curious.. how are these coming along?
Posted by: mb911 Apr 23 2018, 09:10 AM
Just curious.. how are these coming along?
Steve brackets shipping today..
Posted by: Mueller Apr 23 2018, 09:16 AM
So after all of the testing we have good feed back. The mufflers are quiet as stock and flow a bit better over stock as larger id tubing internally. We still have to tweak the tail pipe locations and may ask for a little assistance with that. I am going to offer 10 of them at 650 for intro pricing and then 900 after that. They will be made 100% of 304 stainless weighs 18lbs, 2.5 dia tail pipe, installation kit will be included, shipping will be extra and to be determined.
Please let me know if you have any questions.
While looking at muffler options for my little 1.8 I stumbled upon this thread again.
My pea brain is struggling with the flow on muffler internals. Can you do a little MS paint since to me it looks like the exhaust would just want to directly exit the tail pipe and that the baffling would do nothing or am I over thinking the tubes and perforations?
PS, do you do any consulting if someone wanted to build their own GT'ish /4 muffler with twin outlets? (asking for a friend, hahaha)
Posted by: mb911 Apr 23 2018, 11:51 AM
So after all of the testing we have good feed back. The mufflers are quiet as stock and flow a bit better over stock as larger id tubing internally. We still have to tweak the tail pipe locations and may ask for a little assistance with that. I am going to offer 10 of them at 650 for intro pricing and then 900 after that. They will be made 100% of 304 stainless weighs 18lbs, 2.5 dia tail pipe, installation kit will be included, shipping will be extra and to be determined.
Please let me know if you have any questions.
While looking at muffler options for my little 1.8 I stumbled upon this thread again.
My pea brain is struggling with the flow on muffler internals. Can you do a little MS paint since to me it looks like the exhaust would just want to directly exit the tail pipe and that the baffling would do nothing or am I over thinking the tubes and perforations?
PS, do you do any consulting if someone wanted to build their own GT'ish /4 muffler with twin outlets? (asking for a friend, hahaha)
Its actually a direct copy of the porsche design in every way.
It has to flow through the plate with holes 1st then flows from there
Regarding building custom muffler is no problem and maybe I could provide a few parts if you want to do some homework
Posted by: maf914 Apr 23 2018, 04:31 PM
Mueller and Mb911, Does this picture help? It has been bouncing around the site for a while.
Attached image(s)
Posted by: Mueller Apr 24 2018, 11:05 AM
Mueller and Mb911, Does this picture help? It has been bouncing around the site for a while.
thanks, it took me a few seconds to map it all out, i think I figured it out
Posted by: Rav914 Apr 26 2018, 06:05 AM
Hi Ben,
If I may ask, where do you get your supplies? I'm going to attempt to assemble a similar muffler for my 1911cc with stock HE's. I have some time off from work and want to test my welding skills.
There's a muffler shop nearby that will most likely sell me the smaller diameter tubing for the internals. So, I'd be looking for the large diameter pipe, the bulkheads and drilled/slotted pipe. Thanks,
Nate
btw, I've had your mufflers on a '65 911 and a '74S I used to own. I bought them in '06. I thought they were fantastic.
Posted by: mb911 Apr 26 2018, 06:29 AM
Hi Ben,
If I may ask, where do you get your supplies? I'm going to attempt to assemble a similar muffler for my 1911cc with stock HE's. I have some time off from work and want to test my welding skills.
There's a muffler shop nearby that will most likely sell me the smaller diameter tubing for the internals. So, I'd be looking for the large diameter pipe, the bulkheads and drilled/slotted pipe. Thanks,
Nate
btw, I've had your mufflers on a '65 911 and a '74S I used to own. I bought them in '06. I thought they were fantastic.
Nate we have the parts laser cut and spun locally .. Call me or email a list and I will see what I can do..
Posted by: Rav914 Apr 27 2018, 10:00 AM
Thanks Ben, email sent.
Posted by: mb911 Aug 1 2018, 02:52 PM
Here is a 2 in 2 out that I built for a customer and went a different direction. 950 Retail 750 shipped in lower 48.
Posted by: mb911 Feb 26 2019, 06:53 PM
Going to do another round of these quiet mufflers. Let me know if anyone is interested.
Posted by: roblav1 Feb 26 2019, 08:29 PM
I might be in for a complete exhaust as well as oil tank. Checking out your site now.
Posted by: Luke M Mar 1 2019, 08:30 AM
Ben,
Sent you a pm on this.
Posted by: mb911 Mar 17 2020, 06:48 PM
So after all of the testing we have good feed back. The mufflers are quiet as stock and flow a bit better over stock as larger id tubing internally. We still have to tweak the tail pipe locations and may ask for a little assistance with that. I am going to offer 10 of them at 650 for intro pricing and then 900 after that. They will be made 100% of 304 stainless weighs 18lbs, 2.5 dia tail pipe, installation kit will be included, shipping will be extra and to be determined.
Cairo94507(Michael) is 1st on the list so 1 more spot.(deposit )
914forme (Stephen)
Steve ( aka steve;)( deposit)
Live free +drive (jon) (deposit)
Rktmn247 (kent) (deposit)
MEpstein(Mark) doesn't count for group buy
Restore2seater (Pat)(deposit)
Dion
Marv E
Mark Howard.
Jmuriz (Nathan)
Deposits will be 300.
I will post pictures as we progress just as I did with the heat exchangers project with delivery in November.. Please let me know if you have any questions.
I wanted to bump this so others could see a proper internal baffle design
Posted by: Steve Mar 19 2020, 02:09 PM
I love your quiet muffler and your heat ex-changers. That and my 916 trans, makes my 3.2 conversion feel like a factory built car.
Posted by: roblav1 Mar 19 2020, 06:02 PM
Ben, Any good deals on mufflers lately? Engine is in the car and expect to attempt to start it within the month.
Posted by: scallyk9 Mar 19 2020, 08:53 PM
Here is a 2 in 2 out that I built for a customer and went a different direction. 950 Retail 750 shipped in lower 48.
I'd just like to comment that this particular custom muffler is incredible. I finally got it installed along with Ben's 1.625" heat exchangers on my 1974 3.2L conversion and I can actually feel the difference. It is a bit loud as Ben had cautioned but the sound is phenomenal and it obviously has a well conceived design and flow. Even the guys at the shop have been raving about it.
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