HASTINGS Replacement Piston Rings — HASTINGS, Set – 48-64, 70-80 Big Twin

Complete replacement piston ring kit engineered to restore compression and control oil for two pistons. 🔧🔥

• Includes top compression rings, second compression rings, and oil control rings.
• Top compression rings are barrel face to aid heat transfer between the piston and cylinder wall.
• Second compression rings are Napier; a reverse twist ring paired with a taper-machined ring face duplicates the outside diameter bottom-side scraping edge of a positive-twist torsional ring.
• Oil control rings are three-piece Flex Vent: the three-piece design allows rails to be manufactured with a small cross-sectional area for improved conformability to the bore.
• Four steel rails and two expanders provide uniform pressure and positive oil control, promoting side sealing and preventing oil from being forced under and behind the ring for better oil economy.
• Includes enough rings for two pistons (unless noted). Two rings per groove, except for the rails which are two rail rings per one expander.
• Made in the USA.