hey i just caught wind of this from a buddy of mine. Not a bad car. I also have a 4 dr gtp, 2002. Somewhat heavily modded. I dont know where you've been reading about your car but please dont put anything lower than a 3.4 pulley on your car w/o somesort of a ported blower, or higher ratio rockers. Alot of GTP's do knock with stock boost, exhaust and a true CAI will help you run 0 or close to it with the 3.4" pulley. You'll need headers and a cam to run a 3.0 safely w/o an intercooler, and anything lower than a 3.0 will need an IC and better injectors. Not flaming, just educating
I just ran a 12.95@107.5 yesterday at CFR, 2.0 60 as well
I can post my mods and some pics/a video if you'd like. Also come check out
www.mnclubgp.com , minnesotas grand prix home!