There has never been a four-door diesel sedan in the Grand-Am series, until now: The blunt, bewinged grille of the Mazda6 GX has blown right through that wall. It's said that racing improves the ...

Next month, racing enthusiasts and collectors will have the unique opportunity to own a piece of motorsport history as the 2009 Porsche Cayman GX.R goes under the hammer at the Henderson Auctions ...