1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

exaust system for 12a turbo?

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Old Jan 27, 2006 | 11:27 PM
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exaust system for 12a turbo?

just like the title says what is a good exaust sytem for turbo 12a ? any suggestions?
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Old Jan 28, 2006 | 03:21 PM
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I'd say Racing Beat but there could be a better system out there for a turbo
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Old Jan 28, 2006 | 03:23 PM
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RB doesn't make a bolt up system for a turbo 12A, it will pretty much has to be custom. The 12A system that they have is way too small to provide proper flow for a turbocharged car.
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Old Jan 28, 2006 | 03:33 PM
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yea, if your using the stock manifld spaced out then you can use a FC downpipe, and then you can do a custiome exhaust back and it shoud be atleast 2.5 inches, and you should use urestricted mufflers like magnaflow, or others of the like. im in the process of doing mine right now, so if you have any questions feel free to PM me, or FB II im sure he wouldnt mind, infact im sure hell chime in. hes helped me out alot with my setup.
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Old Jan 28, 2006 | 05:12 PM
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4 mandrel 45 degree bends 1-90 degree. 4 foot long straight section. some kind of glasspack type muffler to put in the middle and your choice of muffler at the end.

Use 2 45s to make your down pipe, several flanges. 2-45's and a 90 to get up, over and back down the axle.
i made mine out 2.5 inch aluminzed exhaust pipe
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Old Jan 28, 2006 | 05:54 PM
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Originally Posted by seanrot
4 mandrel 45 degree bends 1-90 degree. 4 foot long straight section. some kind of glasspack type muffler to put in the middle and your choice of muffler at the end.

Use 2 45s to make your down pipe, several flanges. 2-45's and a 90 to get up, over and back down the axle.
i made mine out 2.5 inch aluminzed exhaust pipe
where did you buy these pipes?
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Old Jan 29, 2006 | 07:41 PM
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bump
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Old Jan 29, 2006 | 07:57 PM
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JC whitney cheap cheap cheap. got some 2.5 inch flanges from them too and a big exhaust pipe cutter.

My exhaust isnt pretty but as you can see by the avatar it puts the exhaust gasses where they needs to be
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Old Jan 29, 2006 | 08:03 PM
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what kind of muffler did you use?
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Old Jan 29, 2006 | 08:04 PM
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ebay cheapo straight though, my car is loud. but I dont mind.

I do have two vids on the forum that'll give you an idea of how loud it is.

Last edited by seanrot; Jan 29, 2006 at 08:12 PM.
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Old Jan 29, 2006 | 08:08 PM
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First off, I had a RB downpipe to start it all. I bought pipes from summit, 2.5 all the way, pretty cheap. I used a magnaflow cat, magnaflow stainless straight-through, and a cheap summit muffler on the back. Incredibly quiet, quite the sleeper. It was kind of a pain, as I'm not much of a welder, but I got the job done.
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Old Jan 29, 2006 | 08:28 PM
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i love magnaflow..........
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Old Jan 29, 2006 | 10:55 PM
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Hey anybody know what would be a good muffler to have under the body before the rear axle for my turbo project?
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Old Jan 30, 2006 | 12:22 AM
  #14  
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dynamax bullet is what i used right off my downpipe. i dunno why all you guys are using 2.5" piping. i made my exhaust using 3" all the way. i welded the dp directly to the main flange coming off the s4 turbo housing. used two 45 degree bends with a piece of straight in between, then went straight out the back UNDER the axle using one more 45 degree bend and a magnaflow to finish it off.... ALL mandrel. floooows like a mother fugger!



oh and it's actually pretty quiet when cruising.
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