Cylinder Works 19-20 CRF 450 L/21-23 CRF 450 RL/19-23 CRF 450 X Big Bore Cylinder Kit

OEM in apperance, yet performance driven in design. The Cylinder Works Big Bore Cylinder Kits contain a hand matched big bore Vertex piston and top end gasket kit wtih o-rings in an all-in-one kit, providing cost savings over purchasing OEM components separately.