During practice or Happy Hour, teams may put new tires on the car and run a few laps on them. After a few laps, the tires are removed and placed aside for use during the race. Scuffs are typically used during the final pitstop of a race, to give the driver a slight advantage. Speedways that are less than a mile in length. A quick pit stop that involves nothing more than refueling with the amount of fuel necessary to finish the race.
Spoilers add downforce to the car to keep it on the track.
Spoiler measurements are different for Fords, Chevys and Pontiacs in order to ensure that no one make of car has an aerodynamic advantage over the others. The angle at which the spoiler is mounted on the rear of the car. The angle is expressed in degrees between 40 and 70. A penalty, usually assessed for speeding in the pits or unsafe driving. The car must be brought onto pit road at the appropriate speed, and stopped for one full second in the team's stall before resuming competition.