off-roaad h-pipes and x-pipes
I have heard that putting on a x or h-pipe without cats is a bad idea for a modular engine if you mod it alot. is this true.
2003 Silverado Z71
K&N filter, Black diamond plate toolbox, and billet grille on the way.
6" lift kit, rims and tires, Catback, Rhino lining, System