Thanks for the link, but my dad and I run a gunsmithing shop, so we have all the porting tools lol. Think im going to just wait on a decent set of headers. Right now Ive got to get some mufflers. I bought 2 glasspacks, but werent the right size. The impala's is 2in (which is bull****) where as the GTP is 2 1/4. The bad thing is i had already cut the mufflers off before going to my dad's shop to get then welded on. So now im running around town muffler-less lol. It sounds nice at idle, but sounds like a dang cut-out @ WOT, but its so loud I cant hear the s/c screamin lol.