2M5722040 3-5/8" bore chr/moly piston rings. +.040"

For Shovelhead owners running a 3-5/8 inch big bore kit at .040 inch oversize, these Hastings chrome moly rings provide the perfect seal. This set is sold for one cylinder and features 2.0mm compression rings paired with a 4.75mm oil ring. These are high-quality replacement rings designed to fit pistons with standard big bore groove depths. It is important to note that S&S big bore pistons often use a different ring thickness, so always measure your piston grooves to ensure compatibility. Hastings rings are a favorite in the shop for their consistent quality and reliable performance in high-heat environments, making them ideal for keeping your big bore Shovelhead on the road.