K and N KN-621 Premium Oil Filter 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 17 mm welded hex nut can be used for quick and easy filter removal. Engineered to support exceptionally high flow rates while providing outstanding protection from harmful engine contaminants.