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Gibson single-side cat-back exhaust for 2014–2018 GMC Sierra 1500 Denali 5.3L is a stainless cat-back system that boosts acceleration, towing and passing power while exiting behind the rear tire and keeping cabin noise low. It’s tuned for stronger low-end response. Dyno-tested gains average 18–21 hp and 20–22 lb‑ft of torque in the low RPM band. The system includes mandrel-bent stainless tubing, a baffled Superflow muffler with minimal interior drone, polished slash-cut tip, factory-style hangers and hardware for a bolt-on, no-weld installation and a lifetime limited warranty.
Gibson 14-18 GMC Sierra 1500 Denali 5.3L 3.5in Cat-Back Single Exhaust - Stainless
