Hey guys I have a little problem i have this buddy sort of and he has a 99 z28 he says all that is done is intake headers and cut out and of course drag radial but when were on the highway he pull on me that was when i was stock now i have drag radials coldair and x pipe and we are spose to race at the track next week I honestly think he has cam and heads but you guys tell me by the way i have a 03 cobra 10th anniv. thanks