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Discussion Starter · #1 ·
Has anyone tried making a custum atr catback exhaust on an na?
Im thinking about getting a muffler on my custom exhaust setup.
 

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Matt Sherman
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well...there is an ATR exhaust, which as far as I know is only for TT's, and then there is custom.

You can't really get a custom exhaust that's being "mass produced"

if you're looking for a tip, there are alot of different choices, alot of people seem to prefer apexi N1, or HKS dragger style.

Matt
 

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I am pretty sure you can install the atr cat backs. Since you can install turbo exhuast on a non turbo and the other way around.

The only problem is it might have too much flow to retain a good exhuast velocity.

The best bet would be to find a local shop with a mandrel bender and have them install a 2.5 cat back with a good muffler like magnaflow. You might also preffer the sound of resonated exhuast so either resuse yours or buy an aftermarket one.
 

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The ATR exhaust will go on the NA cars, but with the same issues as installing a stock TT exhaust on an NA car - the rear lower control arm's mount points are about 4" further in toward the center than on the TT's so you have to "massage" the pipe a little to get it to clear. Realistically (pricewise), though, you're probably better to track down a stock TT system or get soemthing custom.

EricB

<img src="http://www.3si.org/portal/forums/attachment.php?s=&postid=999757">
This is where the stock TT cat-back on an NA hits the unercarriage. Nothing a big hammer can't make work :)
 

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Discussion Starter · #5 ·
I thought that matt monett originally ordered a muffler from atr and made his own cat-back exhaust and it worked so well that atr took his design and mass produced it. I was wondering if I could order just a muffler from ATR.
 

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Matt Sherman
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SUTHNR said:
the rear lower control arm's mount points are about 4" further in toward the center than on the TT's so you have to "massage" the pipe a little to get it to clear...

by massage, do you mean bang it with a hammer?

Matt
 

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I NEED POWER!!!!!
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What if you bought the 3SX control arms (They appear to be smaller than stock) would there still be a clearence problem? I was also thinking of bolting a full ATR for my tt conversion this fall.
 

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I would also look into just a full stock TT exhaust, they sound really badass on the NA cars because of you higher compression, I would find someone who has already done this and talk to them about it, otherwise, good luck!!!
 

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Eric Hawkins
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I have the factory TT exhaust on my car with a test pipe, it is loud as hell:D .
 

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yeah, I have only heard from people, my firend is doing this to his NA, I REALLY want to hear a sound clip thouhg
 

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DR500s ftw
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I have the Borla TT exhaust on my car and it sounds badass with the testpipe. Sounds like a beast on wheels :) . My mechanic that put it on said that it was a tight fit but didn't have to do anything custom to make it fit. Hope that helps some

Luke
 

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DR500s ftw
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After I drove the car right after the borla was installed, it pulled a little harder to redline but did lose a tiny bit on the low end performance. Got more top end out of it and sounds damn good also. Hope this helps

Luke
 

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wolfeman said:
Would putting a TT exhaust on an NA also give performance gains? Is the piping bigger and muffler more free flowing? Are we talking hp here, or just more noise?
Well since you are going from a 2 1/4? inch, exhaust to a 3 inch exhaust, it is definetly better flow. And my friend just got his on his NA and it sounds tight as shit.
 
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