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The Gibson Dual Extreme cat-back exhaust for 2008–2009 Ford F-250 Super Duty FX4 5.4L is a stainless bolt-on system positioned behind the rear tires for an aggressive stance and pronounced exhaust tone. Mandrel-bent tubing and a baffled Superflow CFT muffler provide a mean sound while minimizing cabin drone. Typical dyno-tested gains of 15–20 horsepower; clamp-on installation, no welding required, and covered by a lifetime limited warranty.
Gibson 08-09 Ford F-250 Super Duty FX4 5.4L 2.5in Cat-Back Dual Extreme Exhaust - Stainless
