Hastings Mfg Moly Piston Rings .005 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 designed for Twin Cam 1690 engines requiring a .005 oversize, ideal for cylinders that have been bored slightly. Manufactured in the USA, they feature a moly coating and three-piece oil ring design to ensure a reliable seal and long service life.
Why riders pick this
- Moly-coated .005 oversize rings for Twin Cam 1690
- Reduces friction and enhances durability
- Three-piece oil ring design for superior oil control
- Works with OEM and Screaming Eagle pistons
- Made in the USA for reliable quality
When your Twin Cam 1690 engine needs more than a standard refresh, these Hastings Mfg .005 oversize Moly piston rings provide the solution for bored cylinders. The moly coating reduces friction and enhances durability, crucial for maintaining performance and extending engine life. With their precision engineering, these rings ensure optimal compression and oil control, vital for any performance-minded V-twin rider.
Engineered for Rebuilt Cylinders
- Moly-coated for reduced friction and increased durability
- .005 oversize for bored Twin Cam 1690 cylinders
- Three-piece oil ring design for reliable oil control
- Compatible with OEM and Screaming Eagle pistons
- Made in the USA for trusted quality
Restore Peak Engine Performance
Using the correct oversize piston rings is paramount after machining your cylinders. These Hastings Mfg rings are crafted to seat properly in .005 oversize bores, restoring crucial compression and minimizing oil bypass. Whether you're chasing more power or simply bringing a high-mileage engine back to life, these rings are a critical component for achieving a strong, reliable Twin Cam 1690. Confirm your cylinder bore size before ordering to ensure correct fitment.
Specifications
- Brand: Hastings Mfg
- Manufacturer Part #: 2M4941005
- Size: Twin Cam 1690cc .005 oversize
- Coating: Moly
- 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 coating?
Moly coatings on piston rings help reduce friction and improve wear resistance, especially under high-heat conditions, contributing to longer engine life and consistent performance.
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 | 865-2050 |
| WEIGHT | 0.24 lb |
