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The Gibson Dual Sport cat-back for 2004–2008 Ford F-150 STX 4.6L routes exhaust behind the rear tire for an aggressive appearance while offering a deep, authoritative tone with minimal cabin intrusion. Dyno-tested to improve low-end torque and horsepower—typically 10–15 hp and 15–20 lb‑ft—this stainless system uses mandrel-bent tubing, a baffled Superflow muffler and polished clamp-on tips. It bolts on with included hardware and carries a lifetime limited warranty.
Gibson 04-08 Ford F-150 STX 4.6L 2.5in Cat-Back Dual Sport Exhaust - Stainless
