Designed for Harley touring bikes, both versions of this muffler are SAEJ2825 compliant. An internal expansion chamber in the baffle core results in horsepower and torque gains over stock mufflers. The performance version is designed to enhance top end power while retaining low end torque, while the touring version trades minimal top end output for a long lasting, rumbling exhaust note. The one-piece, 16-gauge steel tubing muffler shell is finished in either duplex nickel chrome or a Jet Hot black ceramic coating.