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914World.com _ 914World Garage _ 2.0 exhaust on a 1.7
Posted by: Localboy808 Oct 18 2016, 05:58 PM
I bought a Tri-Mil 4 tip exhaust off of Craigslist. But my noob self did not know there was a difference between a 2.0 exhaust and a 1.7/1.8! Well I do now! 
So my question is. Can I use this exhaust with a different set of j-tubes/headers? Or is it impossible? I've been trying to sell it. But if there is a way to use it I'd like to. Could this work?
Thanks, Scott
Posted by: jcd914 Oct 18 2016, 09:26 PM
Depending on what the muffler is made to fit, 73/74 2.0L or 75/76 20L, you can replace your 1.7 Heat exchangers with 2.0 heat exchangers that match your muffler.
You also have to replace the muffler bracket on the back of the trans mission.
There are only 3 different exhaust systems used on 4 cyl 914s.
70-74 1.7L/1.8L system
73-74 2.0L system
75-76 2.0L system
You can use any system on any car but you need the complete system, including the muffler bracket.
The heater connector parts (s-tubes, j-tubes) on 70-74 are all the same, 75-76 are different.
Jim
Posted by: Localboy808 Oct 18 2016, 09:43 PM
Depending on what the muffler is made to fit, 73/74 2.0L or 75/76 20L, you can replace your 1.7 Heat exchangers with 2.0 heat exchangers that match your muffler.
You also have to replace the muffler bracket on the back of the trans mission.
There are only 3 different exhaust systems used on 4 cyl 914s.
70-74 1.7L/1.8L system
73-74 2.0L system
75-76 2.0L system
You can use any system on any car but you need the complete system, including the muffler bracket.
The heater connector parts (s-tubes, j-tubes) on 70-74 are all the same, 75-76 are different.
Jim
Thanks for the info Jim. This is the muffler I have.
How can I tell if it's an early or late 2.0?
Posted by: N_Jay Oct 18 2016, 09:51 PM
So, can anyone tell me why the copper exhaust seals are different?
Posted by: cwpeden Oct 18 2016, 10:56 PM
I've been looking for one of those for years. Big pipes and tips with small mufflers.
Of that type of muffler it was way better than the Monza and way better sound.
Posted by: rdauenhauer Oct 18 2016, 11:02 PM
Depending on what the muffler is made to fit, 73/74 2.0L or 75/76 20L, you can replace your 1.7 Heat exchangers with 2.0 heat exchangers that match your muffler.
You also have to replace the muffler bracket on the back of the trans mission.
There are only 3 different exhaust systems used on 4 cyl 914s.
70-74 1.7L/1.8L system
73-74 2.0L system
75-76 2.0L & 1.8L system
You can use any system on any car but you need the complete system, including the muffler bracket.
The heater connector parts (s-tubes, j-tubes) on 70-74 are all the same, 75-76 are different.
Jim
Here use this
Attached image(s)
Posted by: Localboy808 Oct 19 2016, 07:21 AM
Depending on what the muffler is made to fit, 73/74 2.0L or 75/76 20L, you can replace your 1.7 Heat exchangers with 2.0 heat exchangers that match your muffler.
You also have to replace the muffler bracket on the back of the trans mission.
There are only 3 different exhaust systems used on 4 cyl 914s.
70-74 1.7L/1.8L system
73-74 2.0L system
75-76 2.0L & 1.8L system
You can use any system on any car but you need the complete system, including the muffler bracket.
The heater connector parts (s-tubes, j-tubes) on 70-74 are all the same, 75-76 are different.
Jim
Here use this
Found that graphic after I realized this muffler wouldn't fit. But also realized looking at it that the correct exhaust pipes would have to also be shorter and maybe bent up higher? Just wasnt sure if the ends going into the heads would be the same or not.
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