HASTINGS Replacement Piston Rings — 3.498" bore, +0.010" oversize, moly coated – 83-86 Big Twin, 83-98 Touring, 85-99 Softail, 91-98 Dyna, 83-94 FXR, 99-00 CVO, 88-03 Sportster

Replacement piston ring set designed to control combustion gases and manage oil for reliable engine performance. 🔧

• Includes top compression rings, second compression rings, and three-piece flex vent oil control rings.
• Top compression rings are barrel face to aid heat transfer between the piston and cylinder wall.
• Second compression rings are reverse torsional taper face to promote side sealing and better oil economy.
• Reverse twist ring with a taper-machined face duplicates the OD bottom-side scraping edge of a positive twist torsional ring.
• Oil control rings are a three-piece flex vent design that provides uniform pressure through two expanders and four rails for positive oil control.
• Two rings per groove, except rails which use two rail rings per one expander ring.
• Includes enough rings for two pistons (unless noted).
• 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.