Revolution Bolt-On Big Bore Cylinder Kit 98 Cut Black Harley Twin Cam 99-06

98" kit for 99-06 Twin Cam 3-15/16" bore 4 stroke; 10.3:1cr (w/ 86cc domed heads). Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore No sleeving allows for larger bore sizes NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan Monster big bore kits will require case boring Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set Replacement gasket sets available separately Upgraded cylinders studs and head bolts recommended Made in the U. COLOR/FINISH BLACK / HIGHLIGHTED FINS BORE SIZE 3.9375" DISPLACEMENT 98" STROKE LENGTH 4 COMPRESSION RATIO 10.3:1.

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