671 6-71 Blower Supercharger Bearing Plate Cover. This is a really old school 1/8" thick aluminum cover for a stock style rear bearing plate. These also functional as a girdle for the bearing bosses and add a lot of strength. Give your blower the old school look! I have a few of these also in 1/4" thick also. This sale is for one of the 1/8" thick plates shown.