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 replacement pistons designed for long-term reliability in street and performance applications.

Features

• S&S Cycle engineering
• High-performance piston design
• Harley-Davidson engine compatibility

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1402A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson engines to increase displacement and horsepower.

Frequently Asked Questions

Will these pistons increase my engine displacement?

Yes — S&S Power Packs are designed to raise engine displacement and peak horsepower when matched with compatible cylinders and stroker kits.

Are these a bolt-in replacement?

Power Packs require engine disassembly, cylinder work, and proper machine shop installation. This is not a bolt-in item.

Do I need to tune my bike after installing these?

Yes — after piston installation, engine remapping or carburetor jetting is typically required to optimize fuel delivery and ignition timing for the increased displacement.