High-quality cast Big Bore Cylinders from Twin Power™. Factory style black textured powdercoat finish with highlighted fins. Cast in iron liners for strength and durability and finish honed and ready...

OEM-style standard bore kits include a cast aluminum Cylinder Works cylinder, Vertex Piston and gaskets needed to restore horsepower and performance, as a competitive price point, compared to OEM options.

OEM-style cast aluminum replacement cylinder head comes complete with cam caps and bolts for an out-of-the-box, ready-to-go installation. The unshrouded combustion chamber is designed to improve airflow, featuring a blended...

OEM-style standard bore kits include a cast aluminum Cylinder Works cylinder, Vertex Piston and gaskets needed to restore horsepower and performance, as a competitive price point, compared to OEM options.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.