Designed for the 2013 CRF450R, this American-made exhaust is designed to meet AMA sound testing standards without sacrificing power. The asymmetric muffler shape maximizes packing volume while retaining clearance to the drive chain, sprocket, rear tire and swing arm. This system utilizes a machined titanium mid-pipe coupler at the head pipe/mid-pipe junction to improve joint integrity and sealing. Other features include an RC-4 resonance chamber and a lightweight machined aluminum muffler bracket hanger. This product is 2 pounds lighter than the OEM model and retails at $1,395.