Cobra Tri-Flo Slip On Mufflers Chrome with Chrome Tips 6212 Tri-oval-shaped muffler rear seamlessly transforms into 4in. round front 5 in. wide, 4in. tall thin-line aluminum tip 3in. high-flow core for superior performance Acoustical engineering developments allow an incredibly deep sound because of intense, class-leading resonance absorption and prevention Uses proprietary materials with specific acoustical dampening and thermal insulation properties