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The Gibson single-side cat-back for 2004–2008 Ford F-150 FX4 5.4L is an aluminized system tuned to improve acceleration, towing and low-end response. It exits behind the rear tire and is quieter in the cab than many aftermarket options. Dyno results show average gains of 10–15 hp and 15–20 lb‑ft of torque. Installation is bolt-on with factory-style hangers and a polished tip, plus a lifetime limited warranty.
Gibson 04-08 Ford F-150 FX4 5.4L 3in Cat-Back Single Exhaust - Aluminized
