Hastings Piston Rings Stroke 4,250" Bore 3,498"

These ring sets are manufactured by Hastings and are the ideal combination of performance and durable oil and blow-by control. All ring faces are pre-lapped for an easier fit, and on moly kits, the compression ring features a moly insert in the tread. The exclusive Flex-Vent oil control ring is the easiest to install of all the designs because there are no right sides up or down. It cannot overlap, cannot hollow out and cannot be installed incorrectly. The more than 80 shoulders of the compression-molded, stress-free stainless steel spacer exert uniform pressure on the cylinder track. All Hastings piston rings are sold in pairs for two pistons, with the exception of rings for Evolution Sportster models, which are only sold as single sets. Fits Harley-Davidson Sportster XL 1200 88-16