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The Gibson single-side cat-back exhaust for 1977–1986 GMC C1500 (5.0L) increases low-end torque and improves acceleration for towing and everyday use. Dyno-tested gains typically fall around 10–15 hp and 15–20 lb‑ft in the 1800–3000 rpm range. The stainless mandrel-bent system pairs a baffled Superflow muffler with a polished slash-cut tip, includes hardware and factory-style hangers for a no-weld bolt-on install, reduces in-cab noise and carries a lifetime limited warranty.
Gibson 77-86 GMC C1500 Base 5.0L 3in Cat-Back Single Exhaust - Stainless
