The S1R Black Series full exhaust from Two Brothers Racing showcases a race design while increasing all-around performance All carbon parts are made with a high temp aerospace grade epoxy resin The carbon fabric is made with a 33 million modulus carbon tow then impregnated with the high temperature resin under very tight tolerances Aerospace high-temp Teflon coated magnesium end-cap Stamped spring-fit inlet Aluminum CNC Machined outlet Rubber-lined styled mount Spiral-wound perforated core Accepts P-Series sound reduction tips Product may vary from image shown. Image used for style reference only; Note: Two Brothers Racing products are for closed course competition use only. Not intended for street use