I've got a 2004 Pontiac Grand Prix GTP Comp G (Competition Group package has the 3.29 gear ratio, Tapshift w/ Stabilitrack). It has the (L32) 3800 V6 Supercharged Series III motor with Gen V supercharger. I've had the car for a year or so now. In that year I got stainless headers w/ catless downpipe, intake, tune, 180* tstat, Autolite 104'*, EGR Delete, ZZP Modular Pulley 3.8" (stock in winter) and I run 3.6" Spring/summer with aeroforce scan gauge to monitor knock, etc. Back this summer I got the inferno appearance package for it from PFYC.com, which includes the spoiler, hood, and front air dam.
Here are some pics of the ride: