The A-Main is "The Show." It is the race that pays the racers. 

Larger and heavier Sprint Cars, typically sanctioned by USAC, that are a successor to the roadster-style front engine cars that raced at Indy.

Also called "Alternate Starter." The car that just missed a transfer spot to the main event. In case a car that already qualified for the main event fails to start, the alternate can join the field and start the race.

Also called the "A-Feature." The feature event and biggest race of the program. This is the race that has the most cars, points, prize money, and is generally from 30 to 50 laps.

the point in a corner where a car is closest to the inside edge of the track. Drivers try to "hit" the apex to take the straightest line and maintain maximum speed. 

Straps attached to a driver's arms to limit range of motion and keep the arms and hands inside the car in case of a flip.

Arizona Sprint Car Association.

Legendary race track, located in Gardena, CA. Closed in 1990.

Term used to describe a non-wing sprint car's entry into a corner. The car enters the turn in a slide with the rear of the car leading the front of the car.