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The Gibson single-side cat-back exhaust for 2007 GMC Sierra 3500 Classic SL (6.0L) is a stainless cat-back system built to boost acceleration, towing and passing power while routing exhaust behind the rear tire for reduced cabin noise. Dyno-tested for low-end gains—about 10–15 hp and 15–20 lb‑ft—this bolt-on system uses mandrel-bent tubing, a baffled Superflow muffler for minimal drone, polished slash-cut tip, factory-style hangers and a lifetime limited warranty.
Gibson 2007 GMC Sierra 3500 Classic SL 6.0L 4in Cat-Back Single Exhaust - Stainless
