Vintage centrifual supercharger. Beautiful magnesium housing. Built to aircraft specs. 3 7/8 inch intake. 2 1/2 outlet. Impeller approx 7 inches in dia. Overall housing diameter 12 inches. Appears in good condition. Also listed on ebay check there for photos. $500 OBO reedspeed1@AOL.COM, 772-468-2144 Jim Reed