Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Gibson Dual Extreme cat-back for 2011–2019 GMC Sierra 2500HD Denali 6.0L is an aluminized bolt-on system built for bold looks and a powerful exhaust tone. Dyno-tuned testing shows average gains around 15–20 horsepower. The muffler produces a mean, aggressive sound with polished stainless tips, minimal interior drone, and easy bolt-on installation with included hardware. Backed by a Lifetime Limited Warranty.
Gibson 11-19 GMC Sierra 2500 HD Denali 6.0L 3.5in/3in Cat-Back Dual Extreme Exhaust - Aluminized
