S&S Cycle Power Packs — Harley-Davidson

S&S Cycle Power Packs are forged piston assemblies built for Harley-Davidson engines, engineered to handle high-performance builds and restore worn or damaged original pistons. Designed and manufactured by the industry leader in Harley engine performance.

Features

• Forged piston construction
• S&S Cycle engineering
• Engine component replacement

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1393A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

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

Frequently Asked Questions

What engines are these pistons designed for?

S&S Power Packs are engineered for Harley-Davidson engines. Confirm your engine size and model year with S&S or your builder for the correct fit.

Are these forged or cast pistons?

These are forged pistons, which are stronger and more durable than cast pistons for high-performance and high-boost applications.

Do I need a machine shop to install these?

Yes — piston installation requires engine teardown and honing, plus proper ring gap setup. Professional machine work is essential for reliability.

Will these work in a stock engine?

Power Packs are designed for high-performance builds. Consult S&S or your builder to confirm they suit your engine's intended use and displacement.