Aug 15, 2009 #1 9 96gtchinook Member Joined Sep 1, 2007 Messages 195 Reaction score 0 on aftermarket exhaust systems, is it requires to have obdII catalytic converters. or will our cars run safe(without mil) with universal 3 step cats? thanks
on aftermarket exhaust systems, is it requires to have obdII catalytic converters. or will our cars run safe(without mil) with universal 3 step cats? thanks