HASTINGS Replacement Piston Rings — Bore 3.437", Oversize +0.040" – 41-47, 49-80 Big Twin, 80 Touring, 86 Softail

Replacement piston ring set engineered to provide reliable sealing, improved oil control, and consistent heat transfer between piston and cylinder. 🔧

• Includes top compression rings, second compression rings, and oil control rings.
• Top compression rings feature a barrel-face design with cast coating to aid heat transfer and sealing.
• Second compression rings use a reverse torsional taper face to promote side sealing and improve oil economy.
• Reverse-twist design with a taper-machined ring face duplicates the OD bottom-side scraping edge of a positive-twist torsional ring.
• Oil control rings are a three-piece flex vent design, providing uniform pressure through four steel rails and two expanders for positive oil control.

Includes enough rings for two pistons (unless noted). Two rings per groove, except for the rails that use two rail rings per one expander ring.

Kit includes: 2x Top Compression Rings 0.0625", 2x Second Compression Rings 0.0625", 2x Expander Rings, 4x Steel Rails.

Made in the USA.