Akrapovic GP Slip-On Exhaust Yamaha R1 / R1S / R1M Features Oval-shaped or hexagonal-shaped canister with your choice of carbon fiber or titanium outer sleeve Hexagonal mufflers feature a carbon fiber outlet cap to match the design of each bike Outlet cap, perforated inner sleeve and inlet cap are all made of titanium Joint of the inlet cap is milled on a state-of-the-art CNC machine and connected by high-quality silicon-shielded tempered springs Include a lightweight, compact and high-temperature-resistant carbon fiber muffler clamp Conical or cylindrical link pipe is made of stainless steel or titanium shape is determined on the basis of tests of the connection of the link pipe with the muffler to obtain maximum performance increase Carbon fiber heat shield included, if called for in the design