Pro Circuit T-4 Slip-On Muffler (4H05450) Brand: Pro Circuit Vehicle Type: Dirt Bike  Type: Mufflers Material: Aluminum Fitment: 2005/Honda/CRF450R^^2005/Honda/CRF450X^^2006/Honda/CRF450X^^2007/Honda/CRF450X^^2008/Honda/CRF450X^^ Selling Unit: Each Weight: 6