HASTINGS Piston Ring Set — 3.498" bore, +0.010" 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 for consistent sealing, improved oil control, and long service life. 🔩

The top compression rings feature a barrel face and cast coating to aid heat transfer between the piston and cylinder wall while controlling combustion gases to transfer energy to the crankshaft.

Second compression rings use a reverse torsional taper face to promote side sealing and prevent oil from being forced under the ring, improving oil economy. The reverse twist and taper-machined face replicate the OD bottom-side scraping edge of a positive twist torsional ring.

Oil control rings are a three-piece flex vent design; the rails are manufactured with a small cross-sectional area for superior conformability to the bore. Four steel rails and two expanders provide uniform pressure and positive oil control.

Includes enough rings for two pistons (unless noted). Two rings per groove except for the rails, which use two rail rings per one expander ring. Made in the USA.