HASTINGS Replacement Piston Rings — 3.000" bore, moly-coated – 05-17 Sportster

Includes top compression rings, second compression rings, and oil control rings. 🛠️

Top compression rings feature a barrel face to improve sealing and heat transfer between the piston and cylinder wall.

Second compression rings are Napier style; the reverse twist ring with a taper-machined ring face duplicates the OD bottom-side scraping edge of a positive twist torsional ring, promoting side sealing and better oil economy. 🔧

Oil control rings are a three-piece Flex Vent design that provides uniform pressure through four steel rails and two expanders for positive oil control.

The three-piece rail design allows rails to have a small cross-sectional area for better conformability to the bore, and the set includes enough rings for two pistons. 🇺🇸

Two rings per groove, except for the rails that are two rail rings per one expander ring.