98"NATURAL KIT FOR 99-06 TWIN CAM
***NOTE: Compression ratio calculated using a 84cc twin cam combustion chamber.***
Modern engine designs use very light aluminum cylinders. The aluminum base metal is very soft and would wear out almost instantly without a very special protective barrier. Revolution Performance utilizes Millennium Technologies Nickel Silicon Carbide (NSC) cylinder plating process which forms an extremely hard, extremely durable barrier with less friction, improved heat transfer, less weight, and ultimately more horsepower.