HASTINGS Replacement Piston Rings — 3.437 in bore – 41-47, 49-64, 70-80 Big Twin, 80 Touring

Includes top compression rings, second compression rings, and three-piece oil control rings for positive oil control. 🔧

Top compression rings are barrel face and cast coated to help transfer heat between the piston and cylinder wall.

Second compression rings feature a reverse torsional taper face that promotes side sealing and improves oil economy.

The reverse twist design 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 with four steel rails and two expanders to provide uniform pressure and reliable oil control. 🇺🇸

Made in the USA. Includes enough rings for two pistons; two rings per groove except for the rails that use two rail rings per one expander.