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      03-06-2010, 08:50 PM   #1
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Drives: E92 M3 6MT
Join Date: Jan 2009
Location: NW Ohio

iTrader: (6)

Front Section / X-Pipe Exhaust Diameters

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.