CYLINDER WORKS Cylinder Kit - Big Bore 21003-K02 100% Less restriction = more heat

Less restriction = more heat loss

Integrated features allow use on '04 and up H-D models

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CYLINDER WORKS Cylinder Kit - Big Bore 21003-K02 100% Less restriction = more heatCylinder Kit Big Bore Ready to install, direct bolt on cylinders require no re plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise, Nickel Silicon Carbide plated for long life, Kits come complete with gaskets, cylinder, piston, rings, pin and clips, Big bore cylinders do not require machine work, Made in the U. S. A.