HASTINGS Replacement Piston Rings — 3.875" bore, +0.005" oversize – 12-17 Dyna, 10-17 Touring, 03-06 CVO, 09-17 Trike, 12-17 Softail

Replacement piston rings include top compression rings, second compression rings, and three-piece oil control rings to ensure reliable sealing and oil control. 🔧

The top compression rings have a barrel face to help transfer heat between the piston and cylinder wall, while the second compression rings use a Napier design and a reverse twist to improve side sealing and combustion gas control.

The three-piece Flex Vent oil control rings provide uniform pressure through steel rails and expanders for positive oil control and improved oil economy.

Two rings per groove are supplied (rails are two rails per one expander ring), and the set includes enough rings for two pistons unless otherwise noted. Made in the USA. 🇺🇸