S&S Cycle 4.250" Big Bore Cylinder & Piston Kit - Harley Milwaukee-Eight

Upgrade your Harley Milwaukee-Eight engine with the S&S Cycle cylinder and piston kit, engineered to boost displacement and power. This kit features a 4.250-inch bore, designed for a direct bolt-on installation without requiring major engine teardown. The black granite finish with highlighted fins adds a custom look to your M8 powerplant.

Why riders pick this

• Boosts Milwaukee-Eight engine displacement and power
• 4.250-inch bore cylinders for significant performance increase
• Black granite finish with highlighted fins for a custom look
• Designed for direct bolt-on installation on M8 engines

When you're chasing more usable torque and horsepower from your Milwaukee-Eight, a big bore kit is the answer. The S&S Cycle 4.250" cylinder and piston kit delivers a significant increase in displacement, transforming your M8's performance. It's designed for a straightforward installation, allowing you to uncork your factory motor without complex machining.

Unlock More M8 Power

• Increases engine displacement for substantial power gains
• Features a 4.250-inch bore cylinder for enhanced performance
• Black granite finish with highlighted fins for a custom aesthetic
• Engineered for direct bolt-on installation on Milwaukee-Eight engines

Performance You Can Feel

This S&S Cycle kit is ideal for riders looking to maximize their Milwaukee-Eight's potential. By increasing the bore, you're building a stronger foundation for future performance upgrades like cam swaps or head work. S&S Cycle recommends pairing these big bore cylinders with their specific head bolts for optimal application and durability. Confirm fitment for your specific Milwaukee-Eight model before ordering.

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0739
• Bore: 4.250 inches
• Finish: Black granite with highlighted fins
• Weight: 24.85 lb
• Category: Engine Components / Piston Sets - Powersports

Common questions