The automotive aftermarket is typically divided into three major segments: repair parts, service and maintenance, and specialty equipment. The approach used here defines specialty equipment as aftermarket products and services used to improve or otherwise change production vehicles. In this way we differentiate specialty equipment from repair parts used to maintain a vehicle in its original condition. In 1997, sales of specialty automotive products reached $6.85 billion at manufacturer level and retail sales were $19.33 billion. An increase of 57.4 percent from 1990, when the manufacturers' sales of specialty equipment was $4.35 billion.