Hastings Mfg Piston Rings - Twin CAM 1584 OS .005 Moly — Harley-Davidson Road King, Electra Glide Ultra Classic, Softail Heritage Classic (1999-2017)

Hastings Mfg piston rings for Twin Cam 1584cc engines in .005 oversized moly construction. Made in the USA and designed to work with OEM and Screaming Eagle pistons, these three-piece oil rings deliver consistent compression and oil control across the ring package.

Features

• Moly construction for durability
• Three-piece oil ring design
• Compatible with OEM and Screaming Eagle pistons
• Made in the USA
• Set of two pistons (see fitment note for TC 113" and 883 XL)

Specifications

• Brand: Hastings Mfg
• Manufacturer Part #: 2M4805005
• Oversized: .005 OS
• Engine: Twin Cam 1584
• Material: Moly
• Length: 5 in
• Width: 1.37 in
• Height: 5 in
• Weight: 0.22 lbs

Fitment

Fits Twin Cam 1584cc V-twin engines. NOTE: For Twin Cam 113" and 883 XL models, these rings are sold per cylinder — you must order two sets per bike.

Frequently Asked Questions

Are these compatible with Screaming Eagle pistons?

Yes — Hastings Mfg piston rings are designed to work with both OEM and Screaming Eagle pistons.

Do I need one or two sets for my bike?

Most Twin Cam models use one set (two pistons). Twin Cam 113" and 883 XL require two sets because rings are sold per cylinder.

What is moly construction and why does it matter?

Moly (molybdenum) plating on the top ring improves wear resistance and compression seal, extending ring life under high RPM conditions.

Are these made in the USA?

Yes — Hastings Mfg manufactures these piston rings in the United States.