HASTINGS Replacement Piston Rings — Bore 3.937", Displacement 107", Piston Size +0.010" – 18-21 Softail, 17-20 Touring, 17-20 CVO

🔧 Precision-engineered replacement piston rings designed to restore combustion sealing and control oil consumption.

• Includes top compression rings, second compression rings, and three-piece oil control rings for reliable performance.
• Top compression rings feature a barrel face and are PVD coated to improve wear resistance and heat transfer.
• Second compression rings are Napier-style with a reverse-twist and taper-machined face to promote side sealing and oil control.
• Three-piece flex vent oil control system uses two expanders and four steel rails to maintain uniform pressure and effective oil scraping.
• Two rings per groove, with the rails arranged as two rail rings per expander; kit includes enough rings for two pistons.
• Made in the USA.

Kit includes:
• 2x Top Compression Rings
• 2x Second Compression Rings
• 2x Expander Rings
• 4x Steel Rails

🛠️ Designed as a complete replacement set to help restore engine performance and oil economy.