For CRF450RL 21-24 CRF450X 19-24 CRF450L CRF450R CRF450RWE CRF450RX 19-20 Motorcycle Cylinder Head Gasket This cylinder head gasket is designed for use with specified CRF450 series motorcycle models.It fits between the cylinder head and engine block to a secure seal for proper engine compression and performance.The gasket is engineered to match the specifications for function and under normal operating conditions.Installation requires adherence to standard mechanical procedures and torque specifications.