HASTINGS Replacement Piston Rings — 3.625" bore – 48-64, 70-84 Big Twin, 80, 83 Touring, 82-83 FXR

Replacement piston ring set engineered to control combustion gases, manage oil, and support reliable engine performance. 🔧

• Includes top compression rings, second compression rings, and oil control rings.
• Top compression rings are barrel face for improved sealing and heat transfer.
• Second compression rings are reverse torsional taper face to promote side sealing and prevent oil migration.
• Oil control rings are three-piece flex vent with four steel rails and two expanders for uniform pressure and positive oil control.
• Three-piece design allows rails to be manufactured with a small cross-sectional area for better conformability to the bore.
• Reverse twist ring with taper-machined ring face duplicates the OD bottom-side scraping edge of a positive twist torsional ring.
• Includes enough rings for two pistons unless noted; two rings per groove, except for the rails that will be two rail rings per one expander ring.
• Made in the USA. 🇺🇸
• Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with the piston for correct ring installation.