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

S&S Cycle Power Packs are precision-forged piston sets engineered to increase displacement and compression in Harley-Davidson engines for street and performance builds. These components are designed for high-output applications requiring reliable, factory-quality construction.

Features

• Precision-forged construction
• Increases engine displacement
• High-compression design
• S&S Cycle engineering

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 310-1401A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 44.19 lb

Fitment

Fits Harley-Davidson engines. Verify your specific engine model and year with S&S Cycle before ordering to ensure proper fitment.

Frequently Asked Questions

Will these work with my stock Harley engine?

Power Packs are designed for high-performance builds. Installation requires machine work and may need supporting modifications — consult a qualified engine builder.

What displacement increase can I expect?

Displacement gain depends on your engine size and the specific Power Pack model. Contact S&S Cycle with your engine details for exact numbers.

Do I need to tune my bike after installing these?

Yes. Piston upgrades require engine remapping and dyno tuning to optimize performance and fuel delivery.

Are these street legal?

Street legality depends on your state and local emissions rules. Verify with your local DOT or DMV before installation.