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 rebuild kit combining 4.32-inch big bore cylinders with matched pistons, cam, cam plate, and oil pump. Designed to deliver significant horsepower gains without requiring custom machine work or extensive engine modifications.

Features

• 4.32-inch big bore cylinders
• Matched piston and ring set
• Included cam and cam plate
• Matched oil pump
• Complete cam chest components

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1227D
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson models. Verify your specific year and engine type with S&S Cycle before ordering, as Power Packages are engineered for different platforms.

Frequently Asked Questions

What's included in the Power Package?

4.32-inch cylinders, matched pistons, rings, cam, cam plate, oil pump, and all necessary gaskets and fasteners for a complete installation.

Do I need to machine my cases?

Power Packages are engineered to minimize machine work. Check the instructions for your specific Harley model to confirm case compatibility.

Is this a bolt-on kit or does it require professional machine work?

This is an engine rebuild kit. Most riders send it to a qualified Harley engine builder familiar with S&S kits for proper installation and tuning.

What kind of horsepower gain can I expect?

Power depends on your base engine, intake, exhaust, and tuning. S&S publishes dyno results by model — contact them with your specific Harley year for realistic numbers.