9Finger Fabrication, M8 engine case bore plug set

Plug 'm! The only right way to cover up crankcase bore openings. Foreign material that gets into the bottom end can cause major damage, using a rag or shop towel can inadvertently introduce these contaminates. This magnetic case bore plug set fits the spigot perfectly, holds the rods and is sold in a 4-pack set for front & rear cylinder. - Range: 4.20" to 4.575" crankcase bore.