L83-99 B/T& XL1200 STD PISTON RINGS (PR)

Includes top compression rings, second compression rings, and oil control rings Cast coated Top Compression Rings are Barrel Face Helps in the the heat transfer process between the piston and cylinder wall Second Compression Ring are Reverse Torsional Taper Face Controls combustion chamber gases allowing the piston to transfer the energy of the expanding combustion gases, to the crankshaft Promotes side sealing that prevents oil from being forced under and behind the ring resulting in better oil economy Reverse twist ring along with a taper-machined ring face duplicates the OD bottom side scraping edge of a positive twist torsional ring Provides uniform pressure through four steel rails and two expanders assuring positive oil control Three-piece design allows rails to be manufactured with a small cross sectional area for better conformability to bore Oil Control Rings are Three Piece Flex Vent Two rings per groove, except for the rails that will be two rail rings per one expander ring. Includes enough rings for two pistons (unless noted). Made in the USA