9FFM821 9Finger Fabrication, M8 engine case bore plug set

Stop using shop rags to cover your crankcase bores. This magnetic case bore plug set from 9 Finger Fabrication is the professional way to keep foreign material out of your bottom end during a build. Designed specifically for 2018 to 2026 Milwaukee-Eight models including 107, 114, 117, and 121 cubic inch engines, these plugs fit the spigot perfectly while holding the rods in place. They are sold as a set of four to cover both the front and rear cylinder openings. With a range covering 4.20 inch to 4.575 inch bores, these tools ensure you do not inadvertently introduce contaminants that could cause major engine damage.