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 assembly designed to restore or upgrade displacement and compression on modern Harley powerplants.

Features

• Finned cylinder design for enhanced cooling
• Complete piston and cylinder assembly
• S&S Cycle engineering and quality
• Direct fit for M8 engines

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-1010A
• Category: Engine Components / Piston Sets - Powersports
• Weight: 30 lb

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) engine models.

Frequently Asked Questions

What displacement does this kit add to my M8?

Displacement gain depends on bore and stroke specifics — consult S&S documentation or contact the manufacturer with your model year for exact figures.

Do I need to tune my bike after installation?

Yes — after any piston and cylinder work, professional tuning is essential to optimize fuel delivery and ignition timing for the new displacement.

Is this a complete bolt-on kit or does it require machine work?

This is a complete assembly, but professional installation by a qualified Harley technician is strongly recommended due to engine removal and precision assembly requirements.

Will this fit my 2020+ Harley with M8 engine?

This kit is designed for M8 engines. Verify your exact model year and engine variant with S&S before ordering to ensure compatibility.