S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Combining a new design forged piston with their 4.25" cylinders to net a tire melting 131 cubic inches when paired with their 4.625" stroker crank. We build our big bore kits and cranks to much tighter tolerarances and with higher quality materials than the factory parts. This new piston/cylinder kit will be a solid platform for massive power.
Key Features
Brand Manufactured by S&S Cycle
Category Engine Components
Type Piston Sets - Powersports
Specifications
Length 17.8 in
Width 14.2 in
Height 12.4 in
Weight 29.3 lbs
Rider Benefits
S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Combining a new design forged piston with their 4.25" cylinders to net a tire melting 131 cubic inches when paired with their 4.625" stroker crank. We build our big bore kits and cranks to much tighter tolerarances and with higher quality materials than the factory parts. This new piston/cylinder kit will be a solid platform for massive power.
Must be used with our stroker flywheels to achieve 131" displacement (part #s 320-0605, 320-0620)
Powder coat finish match factory finish, giving the bike a "sleeper" advantage
Huge displacement increase means huge power increase
Notes
Clearance item. All sales are final.
Please review manufacturer details to ensure proper fitment before ordering.