946422 Replacement 74" Flathead piston kit. +.070"

This MCS piston kit is specifically for 1937 to 1948 74-inch U model Flatheads that have been bored to .070 inches over. These cast aluminum pistons are built to OEM standards for a stock 1200cc Side Valve rebuild, providing a reliable replacement for worn-out original components. The kit is sold as a set and includes pistons, wrist pins, retainers, and piston rings. Because of the significant oversize, it is especially important to follow standard break-in procedures and ensure all engine components are properly matched. Identified by OEM number 946422, this kit is a vital resource for restorers working with vintage Big Twin Flathead cylinders.