Oh my goodness, where to begin here :rolleyes: ?

Competition Group was an option package on the 04 and early 05 GTP models. It featured TAPshift, Magnasteer II, StabiliTrak, 3.29 gearing, red calipers (none of the above were available otherwise on the GTP) and the Infotech package, which was the HUD and the 5 button display, which you could get on a "regular" GTP.

Stickers that say "Supercharged" must have been added by the previous owner, as the only thing on the outside of the car that would say that is a "regular" GTP on the bottom of the right side trunk badge, and you posted that yours says "Competition Group".

Don't know where you heard the tranny lasting with 400whp (must have been a transmission replacement shop) - any additional hp over stock and you're living on borrowed time - maybe say 250whp you'd be OK, but certainly above 300 and every track pass or similar is a Russian Roulette round with the stock tranny .

Gunnar, maybe things are different in the Land Of Ice, but Stateside GTP's did NOT have TAPshift unless they were Comp G's (and now TAPshift is ONLY available on the GXP ).

Crick's post - All I can say is I hope you're just being silly and not dispensing actual advice.

350whp - can and has been done - fastest route is to replace the supercharger with a turbo. See below links for what's been achieved with various mod combos:

http://www.clubgp.com/newforum/tm.asp?m=1433500&p=1&tmode=1&smode=1

http://www.clubgp.com/newforum/tm.asp?m=1550443&cookieCheck=1052392483