2M5722030 3-5/8" bore chr/moly piston rings. +.030"

These Hastings chrome moly piston rings are specifically for Shovelhead 3-5/8 inch big bore applications that have been bored to .030 inch oversize. Sold for one cylinder, this set includes 2.0mm compression rings and a 4.75mm oil ring. Hastings is known for their low-tension, three-piece flex vent oil rings which provide superior oil control without putting unnecessary drag on the cylinder walls. If you are using S&S big bore pistons, keep in mind they usually require thinner rings, so always verify your piston groove measurements. For most other big bore Shovelhead pistons, these chrome moly rings offer the durability and precision needed to keep your motor running strong for years to come.