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Revolution Performance 128" Bolt On Big Bore Kit for '17-Up Harley Davidson 114/117 M-8 Models - Black Granite w/ highlighted fins

SKU: 0931-1040
$1,455.95
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Revolution Performance 128" Bolt On Big Bore Kit for '17-Up Harley Davidson 114/117 M-8 Models - Black Granite w/ highlighted fins

Revolution Performance 128" Bolt On Big Bore Kit for '17-Up Harley Davidson 114/117 M-8 Models - Black Granite 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