Hastings Mfg Piston Rings - M8 1868 OS .005 Moly — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)

Hastings Mfg piston rings for Harley Milwaukee-Eight engines, engineered for OEM and Screaming Eagle pistons in oversized .005" configurations. Available in cast or moly compounds and manufactured in the USA for reliable ring seal and oil control.

Features

• Cast or Moly compound options
• Three-piece oil ring design
• Compatible with OEM and Screaming Eagle pistons
• Made in the USA
• Set covers two pistons (see fitment for TC 113" and 883 XL exceptions)

Specifications

• Brand: Hastings Mfg
• Manufacturer Part #: 2C5232.13
• Oversized: .005"
• Engine: Harley Milwaukee-Eight (M8)
• Length: 5 in
• Width: 1.37 in
• Height: 5 in
• Weight: 0.22 lbs

Fitment

Designed for Harley V-twin motorcycles with Milwaukee-Eight (M8) engines. NOTE: TC 113" and 883 XL models are sold per cylinder — you must order two sets per bike.

Frequently Asked Questions

How many pistons does one set cover?

One set covers two pistons on most engines. TC 113" and 883 XL require two sets per bike (one per cylinder).

What's the difference between Cast and Moly rings?

Moly (molybdenum) rings offer better wear resistance and longevity; Cast rings are a traditional, cost-effective option. Both work with OEM and Screaming Eagle pistons.

Will these work with my stock pistons?

Yes — these rings are engineered for OEM Harley pistons and Screaming Eagle performance pistons in the .005" oversized spec.

Are these made domestically?

Yes — manufactured in the USA by Hastings Mfg.