Well the first mod most ppl do is pull the intake silencer. Supposed to be worth a few ponies on gts dont know about the v6s though. I did pull it on my fiancees car though. After that of course a kn filter. Then gears but id upgrade to a gt 8.8 rear end if you plan on really making some power out of it. Is it a 5 speed or automatic? Other than that id order a pro-charger . Some place called Moran I think sells all kinds of v6 parts like roller rockers and cam for the v6s but that will void your warranty like most things