07-17 HARLEY FLSTC: Freedom Performance Shark Tail Duals Exhaust (Chrome / 36") The world's greatest Sharktail exhaust system with anti-reversion, full range torque and optimal horsepower. Triple-stepped headers 1-3/4" to 1-7/8" to 2" for anti-reversion, full range torque and horsepower. Exclusive 2-1/2" outer diameter full-length, one-piece 220&#176; heavy-duty 16-gauge heat shields. Removable performance baffles or optional quiet baffles (sold separately). O2 ports and plugs provided for early models (when required).