Revolution Performance Black Diamond Big Bore Kits are the most technologically advanced American V-Twin Big Bore Kits in the world. The state of the art cylinders are all aluminum construction with our proprietary Nickel Silicon Carbide plating process. Compared to the competitions cast iron cylinders, Revolution Performance big bore kits are lighter, run cooler, with 10x better wear resistance. The cylinder and the premium forged piston are made from the same material, they heat and expand at the same rate which allows for tighter tolerances and more power.

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Harley Davidson Motorcycles Harley Davidson Milwaukee 8 Harley Davidson Big Bore Kit Harley Davidson Milwaukee 8 Big bore Kit