Bobby Unser, Penske, Indianapolis, 1981 Link to this image full-size: https://www.racefans.net/racefansdotnet-21-10-04-23-59-59-2/Bobby Unser, Penske, Indianapolis, 1981Advert | Become a RaceFans supporter and go ad-freeBobby Unser, Penske, Indianapolis, 1981Previous ImageNext Image