Quote Originally Posted by Bio248 View Post
yes, youll need a tune for it.

you need more than that...by a lot to run a genV with a 3.4. you have no exhaust work. minus headers means you have no exhaust work dont that is worth a damn. you should have bought headers instead of redoing the catback that is good for at least 300+ whp.
I have a 3''ZZP Catless Downpipe and full 2.5'' exhaust. So that means no exhaust work?