A kid I go to school with has a GTP Special Edition. He's kind of a tool, but he told me awhile ago that he wanted to put a smaller pulley on the S/C. Don't remember what size exactly, but I think I remember it was a 3 inch pulley of some kind. He never mentioned anything about different headers or exhaust work. I'm sort of hoping he gets knock in his motor or as Scotty puts it "gets a new friend Chip" because he brags about his car all the time. Can't wait to see how his car turns out.