The company was founded in 1983 in Beaumont, California, USA and is still headquartered there. It quickly established a name for itself as a producer of quality products by capturing seven offroad national championships in 1992.
In 1993, cars equipped with Pro-Line tires swept both the 2WD and the 4WD classes at the IFMAR Offroad Championships, the company's second and third World Championship titles. 1995 saw Pro-Line win its fourth and fifth IFMAR World Championships at Japan's Yabate Arena.
That same year, Pro-Line purchased independent body manufacturer PROTOform Race Bodies, retaining founder Dale Epp to expand the company's market share. That partnership continues today and has placed Pro-Line near the very top of the R/C body market.
Their marketing strategy has expanded in recent years to include PLUGZ, a series of custom Class II and Class III trailer hitch receiver covers for full-sized vehicles as well as So Real 1/24-scale diecast static car models.