Hastings Mfg Moly Piston Rings .010 Oversize - Harley Twin Cam 1690
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.
These Hastings Mfg Moly piston rings are specifically designed for Twin Cam 1690 engines that require a .010 oversize, making them ideal for cylinders that have been bored. Made in the USA, these rings feature a durable Moly compound and a three-piece oil ring design for superior sealing.
Why riders pick this
- Moly compound .010 oversize rings for Twin Cam 1690
- Designed for bored cylinders
- Three-piece oil ring for excellent oil control
- Works with OEM and Screaming Eagle pistons
- USA-made for quality and reliability
When rebuilding a Twin Cam 1690 engine with cylinders bored to .010 oversize, these Hastings Mfg Moly piston rings are the precise fit you need. The Moly compound construction ensures excellent wear resistance and durability, critical for the demands of a high-performance V-twin. Their advanced three-piece oil ring design is key to maintaining proper oil control and preventing blow-by, ensuring your engine runs efficiently and reliably.
Precision Engineered for Performance
- Moly compound construction for long-lasting durability
- .010 oversize for accurately bored Twin Cam 1690 cylinders
- Three-piece oil ring design for superior oil control
- Compatible with OEM and Screaming Eagle pistons
- Manufactured in the USA to exacting standards
Essential for Rebuilt Twin Cam Engines
After a cylinder bore, selecting the correct oversize piston rings is non-negotiable for achieving optimal engine performance and longevity. These Hastings Mfg rings are engineered to restore compression and minimize oil consumption in your Twin Cam 1690. They are a crucial component for any serious engine builder looking to bring a Harley-Davidson back to peak condition, ensuring a tight seal and reliable operation.
Specifications
- Brand: Hastings Mfg
- Manufacturer Part #: 2M4941010
- Material: Moly
- Oversizing: .010 in
- Length: 5 in
- Width: 1.37 in
- Height: 5 in
- Weight: 0.24 lbs
Common questions
How many pistons does one set cover?
One set covers two pistons for most standard Twin Cam 1690 applications. However, TC 113" and 883 XL models are sold per cylinder and require two sets per bike.
Are these piston rings compatible with Screaming Eagle pistons?
Yes, these Hastings Mfg Moly piston rings are engineered to work with both OEM (stock) and Screaming Eagle pistons.
What is the benefit of a Moly compound ring?
Moly compound rings offer superior wear resistance and durability compared to traditional cast rings, making them ideal for performance applications and extended engine life.
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 | 865-2051 |
| WEIGHT | 0.24 lb |
