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RossA4
03-10-2008, 01:32 PM
im going to be building an exhaust for my car. currently im on a stock turbo, i plan on going to a gt28rs eventually should i do a 2.5 inch exhaust? also if i get rid of the cat with a test pipe i know the car will throw a code, does this code take away from performance or just keep the CEL on?

audiFUEGO
03-10-2008, 01:35 PM
testpipe code does not affect performance.

Go 3" if you plan on going BT.

otherwise go 2.5"

RossA4
03-10-2008, 04:39 PM
igh cool. just figured id ask. what would be a good muffler to use?

P3RryaudiA4
03-10-2008, 04:46 PM
I'd go with borla as everyone i talked to said it was worth the money.
I'm in the middle of an exhaust right now, i just got the tips and im waiting for my borla. Then i will be welding em up and seeing how it sounds. I also plan on doing a test pipe but i want to wait till the summer.