The aFe Rebel Series cat-back exhaust for 2009–2018 GM Silverado/Sierra 1500 (fits specified crew cab/long bed and similar applications) is a dual, middle-side exit system built from mandrel-bent 3" to dual 2½" tubing with a high-flow muffler. Measured on aFe's dyno, it delivers about +14 horsepower and +17 lb-ft of torque, and includes hardware for a bolt-on installation and distinctive black tips.
aFe Rebel Series 3in to 2.5in 409 SS Cat-Back Exhaust w/ Black Tips 09-18 GM Silverado/Sierra 5.4L