2M6482030 3-7/16" bore chr/moly piston ring set. +.030"

For 1941 to early 1978 1200cc Big Twin rebuilds requiring a .030 inch oversize, these Hastings chrome-moly rings provide a reliable solution. They are designed for the classic 3-7/16 inch bore size and include 1.6mm compression rings along with a 4.75mm three-piece oil ring. The low-tension flex-vent oil ring design helps reduce friction while maintaining excellent oil control. Sold as a pair, these rings are a favorite among engine builders for their consistent quality and fitment. Whether you are working on a Panhead or an early Shovelhead, these rings ensure your cylinders maintain the compression needed for dependable street performance.