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

S&S Cycle Power Packs combine big-bore cylinders up to 4.32" with matched cam, cam plate, oil pump, and all supporting components in a single kit for Harley-Davidson engines. Engineered to deliver reliable horsepower gains without requiring extensive custom fabrication or sourcing parts separately.

Features

• 4.32" big-bore cylinders
• Matched high-performance cam and cam plate
• Included oil pump and cam chest components
• Complete bolt-on kit design

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1108D
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson engines. Verify your specific model year and displacement with S&S before ordering to confirm compatibility with your engine platform.

Frequently Asked Questions

What's included in the Power Pack?

Cylinders, pistons, cam, cam plate, oil pump, and all necessary cam chest components — everything needed for a complete big-bore build.

Do I need to buy a tuner or fuel controller separately?

Fuel management is typically required after installation. Consult with your S&S dealer or engine builder for tuning recommendations based on your specific bike.

Is professional installation required?

Yes. Power Pack installation requires engine removal, machine work, and precise assembly. Have an experienced Harley shop or engine builder handle the installation.

What horsepower increase can I expect?

Power gains depend on your base engine, fuel octane, tuning, and other modifications. Contact S&S for dyno data specific to your model.