After today's race, Chevrolet dropped out as a supplier of engines to the Indy Racing League (IRL) Interesting. Although previous Indianapolis 500's have had their share of British engines as well as American iron, the 2006 Indy 500 will most likely be a fight between the best from Honda and Toyota. There may be a stray entry of an older car with a Chevy, but IRL is now All Japanese when it comes to engines!