Quote Originally Posted by blwn3800 View Post
Surprised no one has said anything..you have no business running that 3.4 on there. Nowhere NEAR enough mods on that gen V. Do yourself a favor and forget the mufflers and pick up some headers or put the stock pulley back on.
I'm kinda with this guy. A 3.4 is a pretty serious upgrade on an 04+ car, and you should be looking to see if there is any KR, because I'm willing to bet there's 4-6* there. I've seen several of those cars that I've had to pull timing on even a stock pulley when they didn't have headers.