This Petaluma office is the headquarters for Pit Stop USA, a major online and mail-order auto racing parts and accessories dealer. The company sells helmets, racing suits, shoes, gloves, head and neck restraints and many other racing-related products. Pit Stop sells from a vast catalog of 40,000 parts and 400 brands, and it has been in business since 1999, with an e-commerce presence since 2000.