S&S Cycle Shadow Muffler Kit - Black Ceramic with Black Highlighted Machined End Cap 550-0831Increased power and torque Stainless steel header construction High flow catalytic converters on 50 state compliant applications Includes adapters that allow use of wide band or stock O2 sensors Machined aluminum end cap Deep performance exhaust note Systems without catalytic converters include removable dB reducer Shadow Muffler kits fill the left side cutout in extended saddlebags when running a Sidewinder 2: 1 exhaust system Matched muffler body is