Fastest in practice, Kurt Busch to go to backup car for race

Kurt Busch posted the fastest speed in Thursday's opening practice for Saturday night's Coke Zero 400 at Daytona International Speedway but was forced to a backup car after an accident that damaged the right front on his Penske Racing Dodge.

Busch, who posted a best speed of 189.633 mph, brought out the only caution of the session when a Goodyear tire blew coming out of Turn 2, sending his car into the wall.

Gillett Evernham Motorsports' Kasey Kahne recorded the second-fastest speed at 189.143 followed by Joe Gibbs Racing's Tony Stewart at 188.846.