HASTINGS Replacement Piston Rings — Bore 3.498", Oversize +0.005" – 78-86 Big Twin, 80, 83-98 Touring, 85-99 Softail, 92-98 Dyna, 82-94 FXR, 86-03, 05-17 Sportster

🔧 Replacement piston rings kit includes top compression rings, second compression rings, and oil control rings for two pistons.

🔥 Top compression rings are barrel face to assist heat transfer between the piston and cylinder wall and to control combustion gases, allowing efficient energy transfer to the crankshaft.

↪️ Second compression rings feature a reverse torsional taper face that promotes side sealing and better oil economy; the reverse twist with a taper-machined face recreates the OD bottom-side scraping edge of a positive twist torsional ring.

🛢️ Oil control rings use a three-piece flex vent design: two thin rails and one expander provide uniform pressure through four steel rails and two expanders, assuring positive oil control and conformability to the bore.

🇺🇸 Made in the USA. Due to thermal conductivity and piston design, pay special attention to top ring end gap and read instructions furnished with the piston for correct ring installation.

Note: Kit includes enough rings for two pistons unless noted; two rings per groove except for the rails, which use two rails per one expander.