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

S&S Cycle Power Packs are high-performance piston sets engineered for Harley-Davidson engines to increase displacement and horsepower. Direct OEM-quality replacement pistons built to S&S specifications for durability and reliable power gains.

Features

• S&S Cycle manufactured pistons
• Engine performance upgrade
• Increases displacement and horsepower

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1398A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson engines. Consult S&S documentation or contact V-Twin Bikers to confirm fitment with your specific engine size and year.

Frequently Asked Questions

Will these pistons increase my horsepower?

Yes — S&S Power Packs increase displacement and horsepower when properly installed with matched components like cylinders and heads.

Do I need to rebore my cylinders?

Cylinder fitment depends on your engine size and desired displacement. Consult S&S specifications or a Harley technician before ordering.

Are these pistons street-legal?

S&S pistons are legal for street use when installed as part of a complete, EPA-compliant engine build. Check local regulations for your area.

What's the warranty on these pistons?

S&S Cycle stands behind their parts. Refer to the manufacturer's warranty documentation included with your purchase.