2M6127005 3-1/2" bore piston rings chr/moly. +.005"

These Hastings chrome-moly piston rings are a top-tier choice for refreshing a late 1978 to 1984 Shovelhead 1340cc Big Twin. This set is designed for a 3-1/2 inch bore with a .005 inch oversize. Sold as a pair, the kit includes 1.6mm top and second compression rings along with a 4.75mm oil ring. Hastings uses a low-tension, three-piece flex vent design for their oil rings to ensure excellent lubrication and oil control without excessive drag. Before installation, it is good practice to measure your piston grooves to ensure these rings are the correct height for your application. These rings are built to handle the heat and pressure of a classic Shovelhead, providing a durable seal.