Straightline Carbon Fiber MufflerThe lightest muffler in the industry. Installation is simple and there zero jetting or fuel programming requirements. This is an extremely high end muffler with full stainless steel internals, and high end carbon fiber housing. The carbon muffler is designed for off trail and mountain use as it is on the louder side of the mufflers that Straightline Performance builds. The muffler is completely rebuilding able muffler for lifetime usage. Rebuild kits