chevy_mudder09
1/7/2008 10:16:33 AM
I Have a 2007 Chevy 2500HD with the 6.0 vortec. I was wondering what kind of performance upgrades are out there? I already have a Cold Air intake and an exhaust system.
EvansBlue
1/17/2008 1:13:35 PM
Computer chips. Bully dog and Superchips are good.
