S&S Cycle 4.25-inch Bore 131ci Cylinder & Piston Kit - Harley Milwaukee-Eight Touring & Softail

This S&S Cycle cylinder and piston kit is engineered to transform your Milwaukee-Eight Harley-Davidson big twin into a formidable 131 cubic inch powerhouse. Designed for 2017 and newer models, this kit delivers significant horsepower gains while seamlessly integrating with your existing engine architecture.

Why riders pick this

• Achieves 131 cubic inches with S&S stroker cranks
• Features durable forged piston design
• 4.25-inch cylinder bore for significant power gains
• Powder coat finish blends with factory engine
• Retains stock engine height and crankcases
• Includes 131-inch displacement cam cover badge

For riders chasing serious cubic inches and a substantial boost in performance, the S&S Cycle 131ci cylinder and piston kit is the answer. It bores your Milwaukee-Eight engine to 4.25 inches, and when paired with S&S stroker cranks, unlocks the full 131 cubic inches of displacement. This upgrade is about more than just numbers; it's about a V-twin that pulls harder and delivers a more exhilarating ride, all while retaining the factory engine height and cases.

Unlock Next-Level Milwaukee-Eight Performance

• Forged piston design built for extreme durability and power
• 4.25-inch cylinder bore for substantial displacement increase
• Powder coat finish matches the factory engine appearance
• Includes 0.030-inch MLS head gaskets for optimal sealing
• Works with stock crankcases, simplifying the installation process
• Retains original engine height for a factory look
• Comes with a 131-inch displacement cam cover badge

Built for the Demands of High-Performance V-Twins

This kit is a top-tier upgrade for any Milwaukee-Eight owner looking to maximize their engine's potential. The forged pistons and tight manufacturing tolerances ensure reliability even under the increased stress of higher horsepower. While the cylinders provide the bore, achieving the full 131 cubic inches requires pairing with specific S&S stroker flywheels. This comprehensive approach ensures a balanced and powerful engine that's ready to dominate the road.

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0762
• Category: Engine Components / Piston Sets - Powersports
• Weight: 27.06 lb

Common questions