Collection: 2007-2014 GMC Sierra 3500HD CatBack Exhausts

Cat-back exhaust systems guaranteed to fit your 2007-2014 GMC Sierra 3500HD, both 6.0L gas and 6.6L Duramax diesel configurations. Shop MBRP, Flowmaster, MagnaFlow, and Borla in single, dual, and stack-ready layouts for regular, extended, and crew cab pickup and chassis-cab builds.

Will a cat-back void my Duramax warranty or trigger a check-engine light? No. Cat-back systems install downstream of the catalytic converter, keep all emissions equipment intact, and are 50-state legal with zero CEL risk on the 6.6L LMM or 6.0L Vortec.

If it is listed here, it bolts to your Sierra 3500HD -- verified fitment, no guesswork.