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 big-bore engine kit combining 4.32-inch cylinders with matched cam, cam plate, oil pump, and internals to deliver reliable horsepower gains without requiring separate component sourcing. Designed as an all-in-one performance upgrade for Harley-Davidson engines.

Features

• 4.32-inch big-bore cylinders
• Matched high-performance cam and cam plate
• Included oil pump and cam chest components
• Complete kit reduces sourcing individual parts

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1054D
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson engines. Verify your specific engine displacement and model year with S&S or your builder before ordering.

Frequently Asked Questions

What's included in the Power Package?

Cylinders, pistons, cam, cam plate, oil pump, and all matched cam chest components needed for installation.

Do I need to bore my engine, or will this bolt on?

This is a big-bore kit — your engine will need to be bored to 4.32 inches by a qualified builder. It does not bolt onto a stock engine.

Will this work on my Twin Cam or Milwaukee-Eight?

Verify fitment with S&S Cycle or your engine builder — different Harley engine families require specific kits. Do not assume compatibility.

Do I need to rejet or tune after installation?

Yes — a complete engine rebuild kit like this will require carburetor rejetting or fuel mapping for optimal performance and reliability.