143" kit for 2017+ M-Eight 114"/117" 4-1/2" bore; 4-1/2" stroke; 11.4:1cr (w/ 88cc 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.S.A.

COLOR/FINISH HIGHLIGHTED FINS / BLACK
BORE SIZE 4.500"
DISPLACEMENT 143"
STROKE LENGTH 4-1/2"