HASTINGS Replacement Piston Rings — Bore 3.750" – 99-06 Touring, 00-06 Softail, 99-06 Dyna

Replacement piston rings include top compression rings (barrel face), second compression rings (Napier), and three-piece flex vent oil control rings. 🔧

Top compression rings are barrel face to improve ring conformity and help transfer heat between the piston and cylinder wall.

Second compression rings feature a reverse twist and taper-machined face to duplicate the OD bottom-side scraping edge of a positive twist torsional ring, promoting side sealing and better oil economy.

Oil control rings use a three-piece flex vent design with four steel rails and two expanders to provide uniform pressure and positive oil control.

The three-piece rail design allows rails to have a small cross-sectional area for improved conformability to the bore.

Includes enough rings for two pistons, with two rings per groove except for the rails (two rail rings per one expander).

Made in the USA. 🇺🇸