Replacement K & N for GB 492 sedan ARPM - rectangular. These are being discontinued by K&N wef 10/20 and once supplies on hand are gone there will be no more.
Air cleaner to fit GB 501B-55-AC. The overall height of the air cleaner is 3-3/4". The O.D. at the bottom is 4-1/8" and the O.D. at the top is 3-1/2". When fitted, the total height is 5-1/2".