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The Gibson Dual Extreme cat-back exhaust for 2011–2012 Ford F-150 STX 3.7L is a stainless bolt-on system that exits behind the rear tires for a bold look and aggressive tone. Mandrel-bent tubing with a baffled Superflow muffler and polished slash-cut tip yields authoritative sound while keeping interior noise controlled. Dyno-tested typical gains of 15–20 horsepower; installation is clamp-on with included hardware and the system has a lifetime limited warranty.
Gibson 11-12 Ford F-150 STX 3.7L 2.5in Cat-Back Dual Extreme Exhaust - Stainless
