The 2005 MBNA RacePoints 400 was a Nextel Cup event held at Dover International Speedway on June 5, 2005. Greg Biffle won another event, leading the most laps and holding off Kyle Busch by 4.3 seconds. Ironically, Biffle then wrecked his car while doing donuts. Points leader Jimmie Johnson finished 4th and now held a 46-point cushion on Johnson.