HASTINGS Replacement Piston Rings — 3.498 in bore, +0.005 in 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 includes top compression rings, second compression rings, and oil control rings for reliable sealing and effective oil management.

Top compression rings are barrel face to assist heat transfer between the piston and cylinder wall, while second compression rings use a reverse torsional taper face to promote side sealing and improved oil economy.

The reverse twist ring combined with a taper-machined ring 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 four steel rails and two expanders, assuring positive oil control and better conformability to the bore.

Made in the USA. 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.

Please read the instructions furnished with the piston for correct ring installation; special attention is required to the top ring end gap due to KB piston thermal conductivity and design.