LBZ duramax Gibson cat-back exhaust before muffler delete

2006 chevy duramax with a 4in Gibson cat-back exhaust before muffler delete. only mods are the exhaust and the PPE airbox mod, otherwise stock. cat is still in place, darn smog regs…..

Tags: Before, CatBack, Delete, Duramax, exhaust, Gibson, Muffler

3 Responses to “LBZ duramax Gibson cat-back exhaust before muffler delete”

1. VaMoneyCow says:

   November 22, 2011 at 6:24 pm

   That turbo sounds so fucking sweet
2. elcaminomant says:

   November 22, 2011 at 6:27 pm

   @mirc225 anywhere from 8 towing to 20+ at 65mph on the freeway
3. mirc225 says:

   November 22, 2011 at 6:40 pm

   whats ur mpg?