Top End

Huge bore increase (4.320") means huge power increaseRetains stock engine heightPowder coat finish match factory finish, giving the bike a “sleeper” advantageWorks with stock crankcasesMLS...

Cylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders, pistons, rings and gaskets (head, base and exhaust)Black powder-coat finishMade in the U.S.A...

S&S heads are available to be used with stock-style flat-top pistonsKits are fully assembled, and include stainless steel valves and high-lift (.585") springsIntake manifold and gasket kits are sold...

Revolution Performance, Llc Cylinder Kit - 109" - Natural Silver Rp201-215W

Revolution Performance, Llc Cylinder Kit - 100" - Black With Highlighted Fins Rp201-210W

Revolution Performance, Llc Cylinder Kit - 109" - Black With Highlighted Fins Rp201-216W

Revolution Performance, Llc Cylinder Kit - 100" - Natural Silver Rp201-209W

• Complete bolt-on big bore kit for ultimate strength, durability and power • Includes high-performance forged piston kit with rings, tool steel wrist pins and locks • Comes with complete gasket kit...

• Complete bolt-on big bore kit for ultimate strength, durability and power • Includes high-performance forged piston kit with rings, tool steel wrist pins and locks • Comes with complete gasket kit...

• Complete bolt-on big bore kit for ultimate strength, durability and power • Includes high-performance forged piston kit with rings, tool steel wrist pins and locks • Comes with complete gasket kit...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum...

Revolution Performance, Llc Cylinder Kit - 92" - Natural Silver Rp201-218W