2006 Scion tC Greddy Turbo Kit with Greddy E-Manage Ultimate
 

Hi I was wondering whats the best exhaust pipping size for my boosted tc? I'm running on stock exhaust right now.

Thanks

People debate between 2.5 and 3". I either will do

Ive got the same kit and just purchased a 2.5 downpipe back system. Ill let you know how it goes... but from what ive heard, if your making over 300hp... 3" is the way to go... im below it, so im going 2.5

alright thanks for the replys! let me know how it goes crippie...