Collection: 2015-2019 GMC Sierra 2500HD CatBack Exhausts

Cat-back exhaust systems engineered for the 2015-2019 GMC Sierra 2500HD with the 6.0L Vortec V8 and 6.6L Duramax LML/L5P diesel. Stocked kits from MBRP, Flowmaster, MagnaFlow, and Banks in 4-inch and 5-inch stainless with single or dual tip configurations.

Will a cat-back trigger a check engine light or affect emissions? No. Cat-back systems replace only the piping after the catalytic converter, so factory sensors, cats, and DPF hardware stay untouched and emissions-legal in most states.

Every listing here is verified to bolt to your Sierra 2500HD -- no guesswork.