Hastings Mfg Moly Oversized .005 Piston Rings - Harley Milwaukee-Eight Touring & Softail
About Hastings Mfg
Hastings has manufactured piston rings in the United States since 1915, supplying both the automotive and powersports rebuild markets. Rings are one of the few parts where a rebuild genuinely should not be cheapened.
When rebuilding your Harley Milwaukee-Eight engine, precision piston rings are paramount for optimal performance and longevity. Hastings Mfg offers these moly-faced piston rings in an .005 oversized configuration, engineered to deliver a superior seal and oil control. They are made in the USA for quality you can trust.
Why riders pick this
- Moly coating for reduced friction and wear resistance
- Three-piece oil ring design for optimal oil control
- Designed for .005 oversized Milwaukee-Eight bores
- Compatible with OEM and Screaming Eagle pistons
- Made in the USA
These Hastings Mfg piston rings are designed for Harley Milwaukee-Eight engines requiring an .005 oversized fit. The moly coating on the compression rings is key to reducing friction and wear, ensuring a durable and efficient seal against the cylinder walls. This contributes to consistent compression and improved engine efficiency. The three-piece oil ring design provides excellent oil control, minimizing blow-by and keeping your engine's combustion chambers clean.
Enhanced Durability and Performance
- Moly-coated compression rings for reduced friction and extended life
- Three-piece oil ring design ensures superior oil control
- Engineered for .005 oversized Milwaukee-Eight cylinders
- Compatible with OEM and Screaming Eagle pistons
- Made in the USA for reliable quality
Building a Balanced M8 Engine
Choosing the correct piston rings is a critical step in any Milwaukee-Eight engine build, especially when working with oversized bores. These Hastings Mfg rings are a direct fit for both OEM and Screaming Eagle pistons, offering versatility for your project. Always verify your cylinder bore measurements to ensure proper fitment and performance for your Harley Touring, Softail, or Dyna model.
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
Common questions
How many pistons does one set of these rings cover?
On most Milwaukee-Eight engines, one set of these rings covers two pistons. However, for Twin Cam 113" and Sportster 883 XL models, rings are sold per cylinder, so you'll need to order two sets per bike.
What's the advantage of using moly rings?
Moly (molybdenum) rings offer better wear resistance and longevity compared to traditional cast iron rings. They also provide a quicker break-in period and can reduce friction.
Are these rings compatible with aftermarket pistons?
Yes, these Hastings Mfg piston rings are designed to be compatible with both OEM (Original Equipment Manufacturer) and Screaming Eagle aftermarket pistons.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Hastings Mfg |
| TYPE | Piston kits & Components |
| SKU | 865-2044 |
| WEIGHT | 0.22 lb |
