PCX (Power Chamber Exhaust) technology Chambered high-flow catalyst cartridge designed to increase torque Full coverage heat shields Power chamber hidden crossover CNC-machined billet end caps Includes instructions and mounting hardware 49-state emissions compliant Made in the U.S.A. - Harley-Davidson Softail Slim S FLSS (2016, 2017); Harley-Davidson Softail Slim FLS (2013, 2016, 2014, 2017, 2012, 2015); Harley-Davidson Softail Fat Boy EFI FLSTFI (2014, 2016, 2017, 2012, 2015, 2013); Harley-Davidson Softail Deluxe EFI FLSTNI (2014, 2015, 2016, 2017, 2012, 2013); Harley-Davidson Fat Boy S FLSTFBS (2017, 2016)