 Chassis repair and stiffning panels, These panels are on hundreds of 914's |
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| 914ltd |
 Jul 31 2026, 01:17 PM
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#1
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Member  Group: Members Posts: 246 Joined: 18-April 03 From: Peoria, IL Member No.: 581 Region Association: None 
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I have been making these repair panels since 1984. If you have longitudinal rust, door gap problems or excessive body flex, this panel system is a proven fix. I also have sold many to install in track cars and big engine swaps.
This system is the fastest, easiest and least expensive way to solve your chassis problem. Does not require removal of body panels to install. MIG or stick installation.The panel ties into the 3 bolts of the trailing arm mount and extends to the front wheel house if necessary.Excellent instructions included. This system has been used with Engman's/ Maddog's Porsche 914 Inner Longitudinal Stiffening Kit $375. Includes stateside shipping! 914 Limited Brad Mayeur 1162 N. Byerly Hills Dr. East Peoria, IL. 61611 309-868-4667 P914LTD@yahoo.com Attached thumbnail(s)   Attached image(s)  
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Replies(1 - 9)
| scott_in_nh |
Jul 31 2026, 03:55 PM
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#2
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Senior Member Group: Members Posts: 816 Joined: 10-December 10 From: Hampton, NH Member No.: 12,471 Region Association: North East States |
Hi Brad,
Awesome looking product. I'm not fully sure yet I "need" them, but I might regret it if I don't and need them. The timing is perfect and I will take them. Obviously message me with how you want to get paid etc. Scott |
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| Thunderchief |
Aug 2 2026, 03:53 PM
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#3
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Member Group: Members Posts: 199 Joined: 12-August 19 From: Pasadena, CA. Member No.: 23,365 Region Association: Southern California |
Hi Brad,
My longs are fine but I do want to stiffen up the chassis. Do these go over the existing longs? |
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| 914ltd |
Aug 2 2026, 04:27 PM
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#4
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Member Group: Members Posts: 246 Joined: 18-April 03 From: Peoria, IL Member No.: 581 Region Association: None
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QUOTE(Thunderchief @ Aug 2 2026, 01:53 PM)  Hi Brad, My longs are fine but I do want to stiffen up the chassis. Do these go over the existing longs? Yes. You will need to remove the existing jack receiver and the 2 triangle step plate supports. The installation goes quickly with solid longitudinals. The benefit of this installation will be impressive on the track. Brad |
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| dug |
Aug 2 2026, 04:30 PM
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#5
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914-6 conv in progress Group: Members Posts: 185 Joined: 26-December 06 From: Santa Cruz, CA Member No.: 7,382 Region Association: Northern California |
These require removing the existing jack points, and the sill support triangles. Then these slip up under the sills to support them.
I'm installing these on my car now. I had some rust around the jack points, so they had to come off anyway. I'm using pieces from restoration design outer longs to patch the area around the jack point that needed to be cut out, then adding Brad's panels over the top. The car will definitely be stiffer and ready for another 50 years:) If your longs and jack points are rust free, then it makes more sense to do the engman/maddog interior reinforcement. If you haven't taken your rockers off and checked thoroughly, do that before you decide. cheers, dug |
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| 914ltd |
Aug 21 2026, 09:23 AM
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#6
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Member Group: Members Posts: 246 Joined: 18-April 03 From: Peoria, IL Member No.: 581 Region Association: None
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The material is 11 gauge cold rolled steel. |
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| friethmiller |
Aug 21 2026, 01:45 PM
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#7
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Senior Member Group: Members Posts: 1,525 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region
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QUOTE(dug @ Aug 2 2026, 05:30 PM) These require removing the existing jack points, and the sill support triangles. Then these slip up under the sills to support them. I'm installing these on my car now. I had some rust around the jack points, so they had to come off anyway. I'm using pieces from restoration design outer longs to patch the area around the jack point that needed to be cut out, then adding Brad's panels over the top. The car will definitely be stiffer and ready for another 50 years:) If your longs and jack points are rust free, then it makes more sense to do the engman/maddog interior reinforcement. If you haven't taken your rockers off and checked thoroughly, do that before you decide. cheers, dug (IMG:style_emoticons/default/agree.gif) I've done both kits now on two different cars. The RD outside stiffeners are way easier to install, IMO. However, the increase in metal thickness at the door seam makes it a little awkward [later] when installing the inner door seals. Overall, I think the maddog kit provides better support and is worth the extra effort. |
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| Graydingo |
Aug 22 2026, 10:24 AM
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#8
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Member Group: Members Posts: 98 Joined: 12-August 22 From: Las Vegas Member No.: 26,768 Region Association: Southwest Region |
I bought the RD outside stiffeners. Sorry Brad, wasn't aware of your kit or I would have supported you.
Is using both inside and out overkill? I was afraid the inner kit would mess up the interior backer pad alignment |
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| 914ltd |
Aug 22 2026, 03:29 PM
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#9
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Member Group: Members Posts: 246 Joined: 18-April 03 From: Peoria, IL Member No.: 581 Region Association: None
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QUOTE(friethmiller @ Aug 21 2026, 11:45 AM) QUOTE(dug @ Aug 2 2026, 05:30 PM) These require removing the existing jack points, and the sill support triangles. Then these slip up under the sills to support them. I'm installing these on my car now. I had some rust around the jack points, so they had to come off anyway. I'm using pieces from restoration design outer longs to patch the area around the jack point that needed to be cut out, then adding Brad's panels over the top. The car will definitely be stiffer and ready for another 50 years:) If your longs and jack points are rust free, then it makes more sense to do the engman/maddog interior reinforcement. If you haven't taken your rockers off and checked thoroughly, do that before you decide. cheers, dug (IMG:style_emoticons/default/agree.gif) I've done both kits now on two different cars. The RD outside stiffeners are way easier to install, IMO. However, the increase in metal thickness at the door seam makes it a little awkward [later] when installing the inner door seals. Overall, I think the maddog kit provides better support and is worth the extra effort. While the Engman panels are well designed for chassis stiffness and repair of inner longitudinal and floor edge rust, I don't believe it was designed for addressing door gap and chassis flex which almost exclusively comes from the outer longitudinal jack area and rearward. The chassis panels I sell were specifically created to repair this area and problem. The best test is to lift the chassis in the area of the engine bar (4 cylinder) or the rear of the floor pan. The other benefit of these panels are the go all the way to the "boxed" area below the front fender to tie in the cowl as the original longitudinals did. To check if the cowl has structural problems, determine if the cowl and windshield frame move when the doors are closed. The increased metal thickness at the door seal area would apply just to the Engman/MD parts. Brad |
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| 914ltd |
Sep 9 2026, 07:02 PM
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#10
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Member Group: Members Posts: 246 Joined: 18-April 03 From: Peoria, IL Member No.: 581 Region Association: None
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