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

S&S Cycle Power Package combines 4.32" big bore cylinders with matched cam, cam plate, oil pump, and supporting internals to deliver high-output horsepower on a budget. A complete bolt-together kit that transforms stock Harley engines without requiring machine work or exotic tuning.

Features

• 4.32" big bore cylinders
• Matched high-performance cam and cam plate
• Complete oil pump and support hardware included
• Engineered as a unified system for reliability

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1230D
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

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

Frequently Asked Questions

What engine platforms does this Power Package fit?

S&S Cycle Power Packages are offered for multiple Harley platforms. Confirm your year and engine type (Twin Cam, Milwaukee-Eight, etc.) with the MPN 310-1230D before purchase.

Do I need a tuner with this kit?

Yes — a fuel management system or ECU tune is typically required to optimize the cam and cylinder combination for best power and drivability.

What's included in the box?

Cylinders, pistons, cam, cam plate, oil pump, gaskets, and fasteners needed to assemble the complete cam chest and cylinder upgrade.

Can I install this myself?

Installation requires engine disassembly and reassembly. Most riders use a qualified Harley shop for proper timing, sealing, and break-in procedures.