3800Pro Forums banner

3.8 3800 exhaust zzp cat

  1. ZZP Exhaust on 2006 Grand Prix Help

    If this is the totally wrong forum for this please please point me in the right direction :) I have a 2006 Grand Prix 3.8 L26 NA, low miles, to upgrade the exhaust would I need to install all of the following at once or can I do one at a time with the OEM system...