HASTINGS Replacement Piston Rings — 3.498" bore, +0.030" oversize – 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 engineered to restore compression and positive oil control for two pistons. 🔧

This set includes top compression rings, second compression rings, and oil control rings for reliable sealing and oil management. 🛠️

• Top compression rings are barrel face to aid consistent sealing and heat transfer between the piston and cylinder wall.
• Second compression rings are reverse torsional taper face to promote side sealing and prevent oil from being forced under the ring, improving oil economy.
• Reverse twist design with a taper-machined ring face duplicates the OD bottom-side scraping edge of a positive twist torsional ring.
• Oil control rings are three-piece flex vent; the three-piece design allows rails to be manufactured with a small cross-sectional area for better conformability to the bore.
• Provides uniform pressure through four steel rails and two expanders assuring positive oil control.
• Includes enough rings for two pistons; two rings per groove except for the rails, which use two rail rings per one expander.
• Made in the USA.

Important: due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read the instructions furnished with the piston for correct ring installation. 📦