Features advanced acoustical tuning technologies for deep rumbling sounds. 4" round muffler front expands to 4.5" diameter near the rear. Comes with a 3" core encased in proprietary Cobra sound-tuning materials with specific acoustical dampening and thermal insulation properties; deep bass notes are made possible because of class-leading resonance absorption and prevention. Satin black muffler includes a custom heat shield to smooth transition from stock headpipes to Cobra muffler. Matte titanium finish on aluminum tip matches stock heat shields. Tip features seven, 12-point bolts that provide the dished tip a distinctive, almost aircraft quality look.