109″ Evolution Big Twin Monster Big Bore Kit – Black Highlight

– Fits 1984-2000 Evolution Big Twin Motorcycles with 4 5/8″ crankshaft

– 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. Additional upgraded services recommended.

– Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for SNC cylinders and a head/base gasket set

– Replacement gasket sets available separately

– Upgraded cylinder studs and head bolts recommended

– Made in the U.S.A.