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!