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The Gibson Dual Extreme cat-back exhaust for 2015–2019 GMC Sierra 2500 HD 6.0L is a stainless bolt‑on system that angles outlets behind the rear tires for a bold look and powerful tone. Dyno‑tuned for street performance, it typically yields 15–20 hp gains and a pronounced exhaust note. Features mandrel‑bent tubing, polished tips and a baffled Superflow muffler to control drone; installs with included hardware and carries a Lifetime Limited Warranty.
Gibson 15-19 GMC Sierra 2500 HD Base 6.0L 3in Cat-Back Dual Extreme Exhaust - Stainless
