946485 Replacement 80" Flathead piston kit. +.050"

This MCS piston kit is specifically for the 1937 to 1941 80-inch (1300cc) Flathead models that require a .050 inch oversize. Sold as a set, these cast aluminum pistons are built for a stock-style rebuild, providing the reliability you need for a vintage Side Valve. The kit comes fully equipped with pistons, wrist pins, retainers, and rings, making it a convenient solution for your top-end project. As with any major engine work, it is critical to verify the suitability of all components and ensure a proper break-in period is followed. This kit helps maintain the soul of your classic Harley while providing modern manufacturing consistency. OEM 22222-30 and 946485.