Quick Cat 89
Registered User
what exactly are you porting when you port the stock exhaust manifolds. im wanting to open them up bad to see what results i get but dont know exactly how much to take out and where exactly to do it. i know most people go with porting instead of buying headers and i know you guys know how...i thought it was the lip at the end of the manifold right where it bolts to the exhaust but where else?