S&S Cycle Power Packs — Harley-Davidson Electra Glide, Softail Heritage Classic, Electra Glide Classic (1955-2026)

S&S Cycle Power Package is a complete engine build kit combining 4.32-inch big bore cylinders with matched camshaft, cam plate, oil pump, and supporting components. Engineered to deliver high-performance horsepower without requiring a complete engine teardown and rebuild.

Features

• 4.32-inch big bore cylinders
• Matched camshaft and cam plate
• High-flow oil pump
• Complete cam chest package
• Designed for reliable performance

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1228D
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson models. Verify specific year and engine family compatibility with S&S Cycle before ordering.

Frequently Asked Questions

What's included in the Power Package?

4.32-inch cylinders, matched cam, cam plate, oil pump, and all cam chest gaskets and hardware needed for installation.

Do I need to completely tear down my engine?

Yes — this is a complete cylinder and top-end replacement requiring engine removal and disassembly. Installation should be performed by an experienced Harley tech or shop.

Will this kit require engine tuning?

Yes. A professional fuel mapping or ECU tune is recommended after installation to optimize the new airflow and displacement.

What horsepower gain can I expect?

Power gains depend on your base engine, existing modifications, and tuning. S&S Cycle publishes dyno results for your specific model — contact them for realistic numbers.