HASTINGS Replacement Piston Rings — 3.437" bore, +0.040" oversize – 41-47, 49-64, 70-80 Big Twin, 80 Touring, 86 Softail

🔧 Includes top compression rings, second compression rings, and oil control rings engineered to restore sealing, control oil, and improve combustion efficiency.

Top compression rings feature a barrel face and cast coating to aid heat transfer between the piston and cylinder wall.

Second compression rings use a reverse torsional taper face to promote side sealing and prevent oil from being forced under and behind the ring, improving oil economy.

The reverse twist design combined 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 configuration that provides uniform pressure through four steel rails and two expanders for positive oil control and better conformability to the bore.

Includes enough rings for two pistons, with two rings per groove except where two rail rings share one expander.

Made in the United States.