946482 Replacement 80" Flathead piston kit. +.020"

This .020 inch oversize piston kit from MCS is engineered for the 1937 to 1941 80-cubic inch (1300cc) Flathead models. When your 3-7/16 inch bore cylinders require a more significant cleanup, these cast aluminum pistons provide a reliable, OEM-style solution. The kit is sold as a set and comes complete with the necessary wrist pins, retainers, and piston rings to get your Side Valve Big Twin back together. These are high-quality replacements for OEM 22219-30. Because of the specific nature of these vintage engines, it is important to have a knowledgeable technician verify the fitment and suitability of all parts before installation. Following standard break-in procedures will help ensure these pistons provide smooth performance for your classic 1300cc Flathead.