2M6127010 3-1/2" bore piston rings chr/moly. +.010"

These Hastings chrome-moly piston rings are sized for late 1978 to 1984 1340cc Shovelhead engines with a .010 inch oversize bore. Starting from a standard 3-1/2 inch bore, these rings are engineered for cylinders that have been lightly bored to accommodate wear. The set includes 1.6mm compression rings and a 4.75mm three-piece flex-vent oil ring, designed to provide superior sealing and oil control. Sold as a pair, these rings are a reliable choice for rebuilds where cylinder wall integrity is paramount. As with any Hastings set, ensure you measure your piston grooves to confirm these rings will seat perfectly in your chosen pistons.