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

🔧 Reliable piston ring kit designed to restore sealing, control oil, and improve combustion efficiency.

• Includes top compression rings, second compression rings, and oil control rings.
• Top compression rings are barrel face and cast coated to aid heat transfer between the piston and cylinder wall.
• Second compression rings are reverse torsional taper face to promote side sealing and prevent oil from passing under the ring, improving oil economy.
• Oil control rings are a three-piece flex vent design with two expanders and four steel rails to provide uniform pressure and positive oil control.
• Includes enough rings for two pistons; two rings per groove except for the rails, which use two rail rings per one expander.

📦 Kit includes: 2x top compression rings 0.0625", 2x second compression rings 0.0625", 2x expander rings, 4x steel rails.