B BrownPSU78 Active Member Sep 9, 2004 129 0 27 Sep 9, 2008 #1 Sep 9, 2008 #1 what diameter is the stock exhaust inlet on the v6 muffler?
bigcat start with the upper hole, and if more traction is May 1, 2005 3,015 1 79 7200 feet Sep 10, 2008 #2 Sep 10, 2008 #2 i am pretty sure it is 2.5", since many people use a GT takeoff muffler.
NastyStang113 New Member Sep 12, 2008 1,567 1 0 Florida Sep 13, 2008 #3 Sep 13, 2008 #3 Correct, it's 2.5".