K&N Buell 2.563in OD x 2.969in H Oil FilterK&N premium oil filters for powersports vehicles utilize an innovative, highly efficient synthetic blend filtration media designed to be compatible with synthetic, petroleum based, and blended oils, including the high concentrations of synthetic racing oils. The heavy duty canister is engineered to be exceptionally durable, and a 17mm welded hex nut can be used for quick and easy filter removal. Engineered to support exceptionally high flow rates