these cars are like humans just because we all have eyes and ears, dosent mean that we can see and hear like everyone else.
the best thing you can do for your car is SCAN, i might be able to run a 3.3" pulley and someone with the same mods ,ight only to be able to run a 3.5" pulley.
I would advise 07 GPGT to invest in the MPS pulley system and a 3.6 and 3.6" pullies, and make friends with someone that has a scanner and then check for KR. Chances are you WILL have it, prolly even with the stock pulley!!
