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

S&S Cycle Power Packs are replacement piston sets engineered for Harley-Davidson big-twin engines. Built to OEM specifications, these pistons restore engine performance and are compatible with standard Harley platforms.

Features

• S&S Cycle engineering
• OEM-style construction
• Harley-Davidson big-twin compatible
• Replacement piston set

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1395A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson big-twin engines. Verify your specific engine displacement and year with S&S Cycle before ordering to ensure correct fitment.

Frequently Asked Questions

What Harley engines do these pistons fit?

These are engineered for Harley-Davidson big-twin platforms. Confirm your engine year and displacement with S&S Cycle or your dealer for exact compatibility.

Are these stock replacement pistons or an upgrade?

These are OEM-style pistons built to restore standard engine performance. They follow Harley specifications for direct replacement.

Do I need new rings and pins when I install these?

Consult your engine rebuild manual. New rings, pins, and clips are typically recommended when replacing pistons during an overhaul.

Will these improve my horsepower?

These are replacement pistons built to OEM spec. For performance gains, consult S&S Cycle about their high-compression piston options.