Quote Originally Posted by MitchieGTP View Post
intake, headers, 3.4 pulley, 3" or 2.5" catback, custom tune, fuel pump rewire...basic bolt ons. Then you will have some money left over to rebuild the transmission and have a car that runs mid-low 13s reliably.
LOLWUT?

Quote Originally Posted by MitchieGTP View Post
uhhh...no it wasn't a joke...put a stock gtp up against one that has a mandrel bent 2.5" system and see what happens. I don't see how theres an argument here. A 2.25" system flowing as good as a mandrel bent 2.5" or 3" system? I think not. I regret not putting a cat back on my GTP because the guys that Ive talked to at the track all said they had great gains up top from their after market cat backs on cars with just basic bolt ons...nowhere near 400hp.
Is this because they have different cars? Many cars will respond to a cat back...ours do not. Unless of course you're in the 400whp range. Good luck making 400whp with:
Quote Originally Posted by MitchieGTP View Post
intake, headers, 3.4 pulley, 3" or 2.5" catback, custom tune, fuel pump rewire...basic bolt ons.