 In 1983, Mitsubishi Motors asked him to establish a European base for their motorsport activities, and so he founded Andrew Cowan Motorsports (ACMS).Based in Rugby, Warwickshire, it would evolve into Mitsubishi Ralliart Europe, and his cars took Tommi Makinen to four consecutive WRC Drivers' titles (1996 to 1999), as well as winning Mitsubishi their only manufacturers' crown in 1998.In 2003, Mitsubishi Motors officially took over the business and renamed it Mitsubishi Motorsport, although Cowan remained as "Sporting Advisor" for the next two years until his retirement aged 69.