HASTINGS Replacement Piston Rings — Bore 3.498", Oversize +0.005" – 78-86 Big Twin, 80, 83-98 Touring, 85-99 Softail, 92-98 Dyna, 82-94 FXR, 86-03, 05-17 Sportster

Complete replacement piston ring kit designed to restore compression, control oil consumption, and improve sealing performance. 🔧

Includes top compression rings, second compression rings, and three-piece oil control rings to deliver reliable sealing and consistent oil control. ✅

Top compression rings are barrel face to aid heat transfer between the piston and cylinder wall, helping reduce hot spots and maintain performance.

Second compression rings feature a reverse torsional taper face to promote side sealing and prevent oil from being forced under the ring for better oil economy.

Oil control rings use a three-piece flex vent design; the rails have a small cross section for improved conformability while two expanders and four steel rails provide uniform pressure and positive oil control.

Kit includes enough rings for two pistons; two rings per groove, except for the rails which are two rails per one expander.

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. ⚠️

Made in the USA. 🇺🇸

• 2x Top Compression Rings
• 2x Second Compression Rings
• 2x Expander Rings
• 4x Steel Rails