Hastings Mfg Moly Piston Rings Standard Size - 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 engineered for your Twin Cam 1690 engine, offering a standard size replacement for maintaining optimal compression and oil control. Manufactured in the USA, they're built to last and perform under the demands of your V-twin.
Why riders pick this
- Standard size Moly rings for Twin Cam 1690 engines
- Three-piece oil control design for reliable sealing
- Works with OEM and Screaming Eagle pistons
- Manufactured in the USA for quality assurance
- Essential for maintaining engine compression and oil control
When rebuilding your Twin Cam 1690, choosing the right piston rings is critical for engine longevity and performance. Hastings Mfg delivers a standard size Moly ring set designed for precise fitment and lasting durability. These rings ensure proper cylinder sealing, which translates to consistent power delivery and reduced oil consumption, keeping your Harley-Davidson running strong.
Engineered for Reliable Performance
- Moly ring construction for enhanced wear resistance
- Three-piece oil control design for superior oil sealing
- Compatible with both OEM and Screaming Eagle pistons
- Proudly made in the USA for assured quality
Rebuild with Confidence
Whether you're performing a routine top-end refresh or addressing specific engine wear, these Hastings Mfg piston rings provide a solid foundation for your Twin Cam 1690. Their design ensures compatibility with a range of piston types, making them a versatile choice for many builders. Proper installation of new rings is key to maximizing your engine's efficiency and extending its service life.
Specifications
- Brand: Hastings Mfg
- Manufacturer Part #: 2M4941
- Ring Type: Moly
- Engine Size: Twin Cam 1690
- Size: Standard
- Length: 5 in
- Width: 1.37 in
- Height: 5 in
- Weight: 0.23 lbs
Common questions
How many pistons does one set cover?
One set includes rings for two pistons, covering a complete standard Twin Cam 1690 engine. However, TC 113" and 883 XL models require two sets per bike as they are sold per-cylinder.
Are these piston rings compatible with Screaming Eagle pistons?
Yes, these Hastings Mfg Moly piston rings are specifically designed to be compatible with both OEM (stock) and Screaming Eagle pistons.
Do I need any special tools for installation?
Installing piston rings typically requires a piston ring compressor and other standard engine rebuild tools. Always consult your service manual for specific procedures for your Harley-Davidson model.
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 | 865-2049 |
| WEIGHT | 0.23 lb |
