S&S Cycle Cylinder & Piston Kits — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)

S&S Cycle cylinder and piston kit for Harley-Davidson Milwaukee-Eight (M8) engines, featuring finned cylinder construction for improved cooling. Complete displacement upgrade assembly engineered for street and competition use.

Features

• Finned cylinder design for enhanced cooling
• Complete piston and cylinder assembly
• S&S Cycle engineering and manufacturing
• Direct M8 fitment

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0911A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 30 lb

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) engines.

Frequently Asked Questions

Will this work on Twin Cam engines?

No — this kit is engineered specifically for Milwaukee-Eight (M8) platform. Twin Cam engines require different displacement kits.

Do I need a new fuel map after installation?

Yes. Any displacement upgrade requires professional dyno tuning and ECM recalibration for optimal performance and reliability.

What's included in the kit?

The complete finned cylinder assembly with matched pistons, rings, and pins — everything needed for a drop-in displacement upgrade.

Is professional installation required?

Engine work of this complexity requires machine shop or professional mechanic expertise. DIY installation is not recommended.