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The Gibson aluminized cat‑back single exhaust for 2014–2018 GMC Sierra 1500 5.3L is tuned to boost low‑end power, with reported gains around 18–21 hp and 20–22 lb‑ft of torque. Mandrel‑bent tubing, a baffled Superflow muffler and polished tip provide an aggressive sound with minimal cabin drone. Factory‑style hangers and included hardware allow bolt‑on installation without welding, and the system carries a lifetime limited warranty.
Gibson 14-18 GMC Sierra 1500 Base 5.3L 3.5in Cat-Back Single Exhaust - Aluminized
