[masitr]

I have been trying to find some information on the Aftermarket vs. Stock exhaust system diameters. Needless to say I have not had much luck, mainly on the X-pipe / Front section. Some manufacturers list the rear sections specs and seem to range from 2.5"-3.0".

Any info on the front sections would be appreciated. Also I know some resonators neck down inside. If you noticed this please include.