Stepped head pipe design with no visible bluing • Top-end horsepower without sacrificing low-end torque • A metallic ceramic coating on the internal head pipes retains the right amount of heat, increasing the exhaust velocity for more horsepower • Includes a muffler cartridge that delivers a deep rumble • Optional muffler cartridges are also available offering either a smooth mellow sound or loud sound with improved flow • Includes exhaust gaskets, c-clips, chromed flanges, machined brackets, nuts, bolts and detailed instructions.