HASTINGS Replacement Piston Rings — 3.498" bore – 83-86 Big Twin, 83-95 Touring, 94 Dyna, 83-94 FXR, 00 CVO, 84, 89 Police, 85-89 Softail, 88-95, 97-00, 02 Sportster

Includes top compression rings, second compression rings, and oil control rings designed to restore sealing and oil control for two pistons. 🔧

The top compression rings feature a barrel face to improve heat transfer between the piston and cylinder wall and to control combustion gases, allowing the piston to transfer energy of expanding gases to the crankshaft.

Second compression rings are reverse torsional taper face; they promote side sealing that prevents oil from being forced under and behind the ring, resulting in better oil economy. The reverse twist 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. The three-piece design allows rails to be manufactured with a small cross sectional area for better conformability to the bore and provides uniform pressure through four steel rails and two expanders for positive oil control.

Includes enough rings for two pistons: 2 top compression rings, 2 second compression rings, 2 expander rings, and 4 steel rails. Due to thermal conductivity and piston design, special attention is required to the top ring end gap—please read instructions furnished with the piston for correct ring installation. Made in the USA. 🇺🇸