Phoenix International Raceway (or known as PIR), is a one mile tri-oval race track located in Avondale, Arizona. It opened in 1964, but wasn't used by NASCAR until 1988, with the first race won by the late Alan Kulwicki. After winning, Kulwicki debuted his Polish Victory Lap. It is an unusual tri-oval shape, more like a "D" shape. This is because the owner did not wish to alter the infield road course to accommodate a traditional NASCAR oval. In the past, several leagues including the NASCAR Southwest and the USAC Silver Crown Series have been hosted at the track. It has since been used by the Indy Racing League and an infield road course has been used by the Grand American Road Racing Association. The infield road course was redesigned in 1991, taking it's current form on 1.51 miles long