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 upgrade kit combining big bore cylinders, pistons, cam, cam plate, and oil pump for Harley-Davidson engines. Engineered to deliver increased displacement and horsepower without requiring a full engine rebuild.

Features

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

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1226D
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

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

Frequently Asked Questions

What's included in the Power Package?

Big bore cylinders (4.32"), pistons, matched cam, cam plate, oil pump, and all hardware needed for installation in the cam chest.

Do I need to completely rebuild my engine to install this?

Installation requires significant engine disassembly and machine work. Have a qualified Harley mechanic assess your specific bike before ordering.

Will this kit work on my Harley?

S&S builds kits for multiple Harley platforms. Confirm your engine type and model year with the manufacturer to ensure compatibility.

How much horsepower gain can I expect?

Horsepower increase varies by engine type, base tune, and supporting modifications. S&S publishes dyno results for each kit configuration.