HASTINGS Replacement Piston Rings — Bore 3.437", Oversize +0.030" – 41-47, 49-64, 70-80 Big Twin, 80 Touring

Replacement piston ring set engineered for performance replacement and reliable oil control. 🔧

• Includes top compression rings, second compression rings, and oil control rings.
• Top compression rings are barrel face to improve heat transfer between the piston and cylinder wall and enhance sealing.
• Second compression rings are reverse torsional taper face to promote side sealing and better oil economy.
• Reverse twist and taper-machined face replicate positive twist torsional ring scraping action.
• Oil control rings are a three-piece flex vent design with four steel rails and two expanders to assure positive oil control.
• Two rings per groove, with two rail rings per expander; includes enough rings for two pistons.
• Made in the USA.
• Please read the instructions furnished with the piston for correct ring installation; special attention is required to the top ring end gap.

Designed for dependable sealing and consistent performance. ⚙️