Revolution Performance 128" Bolt On Big Bore Kit for '17-Up Harley Davidson 114/117 M-8 Models - Black w/ highlighted fins
- Aerospace-grade all-aluminum cylinders with nickel-silicon-carbide (NSC) electroplated bores
- No sleeving allows for larger bore sizes
- NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan
- True bolt-on kit that delivers major power durability and strength
- 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
- Made in the U.S.A.
NOTE: Upgraded cylinder studs and head bolts required (sold separately).
- BORE SIZE 4.250"
- DISPLACEMENT 128"
- STROKE LENGTH 4-1/2"
- COMPRESSION RATIO 11.3:1
