Hastings Piston Ring Set – 2M4941 For Harley Motorcycles 1999-2017

Description

Includes top compression rings, second compression rings, and oil control ringsTop Compression Rings are Barrel FaceHelps in the the heat transfer process between the piston and cylinder wallControls combustion chamber gases allowing the piston to transfer the energy of the expanding combustion gases, to the crankshaftSecond Compression Ring are NapierReverse twist ring along with a taper-machined ring face duplicates the OD bottom side scraping edge of a positive twist torsional ring Promotes side sealing that prevents oil from being forced under and behind the ring resulting in better oil economyOil Control Rings are Three Piece Flex VentThree-piece design allows rails to be manufactured with a small cross sectional area for better conformability to boreProvides uniform pressure through four steel rails and two expanders assuring positive oil controlMade in the USAIncludes enough rings for two pistons (unless noted).Two rings per groove, except for the rails that will be two rail rings per one expander ring.SpecsStyleReplacementBore – OversizeStandardBore OversizeStandardRiding StyleStreetBore Size3.875″UnitsSetProduct NamePiston Ring SetRing MaterialMoly CoatedPart NotesIncludes enough rings for two pistons.