Penske's GTP Porsche prototype follows Rolex 24 win with Saturday victory at Sebring
Roger Penske's prototype Porsche has swept historic races at Daytona and Sebring to begin the year. A Porsche, and Mercedes, ...
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24 Hours of Daytona: How fast are four classes of Rolex 24 cars? Let's check lap times
while drivers of the GTD cars must keep one eye on the mirror to know when a speedy prototype is approaching. This article originally appeared on The Daytona Beach News-Journal: 24 Hours of ...