How much HP will an exhaust add?

o yah I forgot

3rd gear would say peace around 300rwhp

also, they cant GTP m90 swap the camaro’s without extensive work. Only one guy has done it, and it took him over a year just to machine the right parts and shit to make it work. The whole setup from the L67 in the GTP’s compared to the L32 on the F-bodys is ass backwards.