Dyno Tested - Significant increases in low and mid-range torque as well as top end horsepower For use with big motor builds (110 cubic inch or bigger), high-compression engines (10.5:1) and or any motor using Forced Air Induction Head pipes start at 1-3/4" and step up to 1-7/8" and 2" meeting up at a 2-1/2" collector Wrath is the only 2-into-1 on the market compatible with a 3[s"] diameter spiral cored baffle for maximum flow & maximum performance Ceramic coated on both the inside and outside of the head pipes; improving exhaust flow and reducing ambient heat up 300deg, lower pipe temperatures are more comfortable for the rider and passenger Heavy-duty, 16-gauge steel, thicker steel longer life and better sound Includes full coverage heat shields to cover the head pipes and collector 4" Big Louie muffler body and three quarter wrap heat shields, with ceramic coating applied internally and externally, cooling the head pipe providing even more performance Spiral louver-packed baffle contributes to the sound and additional power Includes a brilliant chromed end cap, constructed of aircraft grade billet aluminum All mounting hardware is included 1-Year manufacturer's warranty