S&S Cycle 310-1101D 128" Power Pack Engine Performance Kit for Milwaukee-Eight

The S&S Cycle 310-1101D Power Pack is a complete, all-in-one engine performance kit engineered to transform Milwaukee-Eight motors into a high-displacement powerhouse. This comprehensive package bundles a big bore cylinder kit with a matched cam, cam plate, and oil pump — giving you everything needed for a significant power upgrade in a single, compatibly engineered solution.

Key Features:

• Big Bore Cylinder Kit — Bolt-on design requires no engine case machining for installation
• Forged Pistons — High-strength forged construction for durability under high-performance conditions
• S&S Oil Pump & Cam Plate — Precision machined from billet aluminum with blue anodized finish; passage plugs are removable for easy servicing
• Independent Scavenge Sections — Separate scavenging for the flywheel cavity and cam chest for optimized oil control
• Debris Protection — Debris screens in both scavenge pickups and a magnet in the cam chest to help prevent contamination from entering the oil pump
• Made in the USA — Designed and manufactured by S&S Cycle, a trusted leader in American V-twin performance

S&S Cycle Power Packs take the guesswork out of engine building by delivering a fully matched, tested combination of components. Rather than sourcing individual parts separately, this kit ensures all components work together for reliable, consistent power output. It is an ideal solution for riders seeking serious displacement gains with a straightforward bolt-on installation process.