Quote Originally Posted by Meemperor View Post
we're putting a 4.2" pulley on my friends mom's GTP. mmmm tuned for regular gas and low boost !
Thats not a bad idea either. Fuel economy goes up with lower octane. That blower sure would look odd with a 4.2" pulley on it though. I guess we are going to have to come up with some belt sizes for the 4.0 and 4.2" pulleys.