dB Drag Racing is an auto sound competition format where competitors compete against one another to see who has the loudest car stereo system. This is the fundamental basis for a dB Drag Racing event.

dB Drag Racing is comprised of two stages of competition; Qualifying and Elimination. During qualifying the maximum Sound Pressure Level (SPL) for each contestant's sound system is measured. At the conclusion of the qualifying stage of competition the eight loudest competitors in each class are then placed in brackets for the elimination portion of the competition. During the elimination rounds, contestants face off in a head-to-head format. The winner of each bracket round advances to the next round of competition and the loser is eliminated from the event.

The dB Drag Racing Association (dBDRA) has gone to great lengths to ensure that the rules for competing in dB Drag Racing are as comprehensive and unambiguous as possible. Even so, there will invariably be times when a particular application or installation will fall outside the scope of this rulebook. When those occasions arise, it is the responsibility of the head judge to make a determination as to whether the incident in question abides by the "spirit" of dB Drag Racing competition. As a competitor, it is your responsibility to understand the rules contained in this book and to abide by any decisions rendered by the head judge.

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