 Honda won the IndyCar Series Manufacturers' Championships in 2004 and 2005, while Honda-powered drivers won the drivers' championships in the same years.In 2006, Honda became the single engine supplier to the IndyCar Series and has committed itself to the series through 2011.Since 2007, HPD has also provided engines to prototype-class teams in American Le Mans Series sports-car racing, and these engines have scored numerous victories, beginning with an LMP2-class win in Honda's inaugural ALMS race, at Sebring in 2007.