After a successful event in Seattle, Slammed Society will be hosting its ONLY stop in Northern California for 2013 at the FIA World Touring Car Championship at Sonoma Racetrack. Slammed Society 2013 – WTCC Sonoma September 8, 2013 Gates open at 8:00 am and event will run through until 5:30 pm 29355 Arnold Drive, Sonoma,…