Hastings Mfg Piston Rings - Twin CAM 1584 STD Size Moly — Harley-Davidson Road King, Electra Glide Ultra Classic, Softail Heritage Classic (1999-2017)

Hastings Mfg piston rings for Twin CAM 1584 engines in standard size, manufactured in the USA with moly coating for reduced wear and improved ring seal. Direct replacement compatible with OEM and Screaming Eagle pistons.

Features

• Moly-coated rings for reduced wear
• Three-piece oil ring design
• Fits OEM and Screaming Eagle pistons
• Made in the USA
• Sets include rings for two pistons

Specifications

• Brand: Hastings Mfg
• Manufacturer Part #: 2M4805
• Ring Type: Moly
• Engine: Twin CAM 1584
• Size: Standard
• Length: 5 in
• Width: 1.37 in
• Height: 5 in
• Weight: 0.22 lbs

Fitment

Fits Harley-Davidson Twin CAM 1584 engines. Note: TC 113" and 883 XL models require ordering two sets per bike, as rings are sold per-cylinder for those applications.

Frequently Asked Questions

Will these fit my TC 113" or 883 XL?

Yes, but order two sets per bike — these ring sets are sold per-cylinder for those specific models, not as a pair.

Are these compatible with Screaming Eagle pistons?

Yes — Hastings rings are engineered to work with both OEM and Screaming Eagle piston kits.

What's the difference between Cast and Moly rings?

Moly-coated rings (this part) offer reduced wear and better ring seal compared to cast rings, especially in performance and rebuilt engines.

Are these made in the USA?

Yes — Hastings Mfg manufactures these rings domestically.