Hastings Mfg Piston Rings - M8 1746 OS .005 Moly — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)

Hastings Mfg piston rings for Milwaukee-Eight V-twin engines, available in cast or moly composition with three-piece oil control design. Made in the USA and compatible with OEM and Screaming Eagle pistons for rebuild and performance applications.

Features

• Available in Cast or Moly composition
• Three-piece oil control rings
• Compatible with OEM and Screaming Eagle pistons
• Made in the USA
• Sold in sets for two pistons

Specifications

• Brand: Hastings Mfg
• Manufacturer Part #: 2C5231.13
• Length: 5 in
• Width: 1.37 in
• Height: 5 in
• Weight: 0.2 lbs

Fitment

Fits V-twin motorcycles including Milwaukee-Eight (M8) engines. Important: TC 113" and 883 XL models require two sets per bike — rings are sold per cylinder for these applications.

Frequently Asked Questions

Are these rings cast or moly?

Available in both cast and moly compositions. Moly rings offer lower friction and better high-RPM performance.

Do I need one or two sets for my 883 XL or TC 113" engine?

You must order two sets per bike — these are sold per cylinder for those models, not per engine.

Will these work with stock Harley pistons?

Yes — compatible with OEM Harley and Screaming Eagle pistons for rebuild applications.

What's included in one set?

One complete ring set for two pistons, including compression rings and three-piece oil control rings.