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The Gibson cat-back single exhaust for 2011–2019 GMC Sierra 2500 HD Denali 6.0L is a stainless single-side system tuned to improve low-end torque and hill-climbing power while keeping a quieter in-cab experience. Dyno testing shows gains concentrated at 1800–3000 RPM. The kit includes a baffled Superflow muffler, polished slash-cut tip, mandrel-bent stainless tubing, factory-style hangers and a Lifetime Limited Warranty for bolt-on installation.
Gibson 11-19 GMC Sierra 2500 HD Denali 6.0L 3.5in Cat-Back Single Exhaust - Stainless
