The new propane fuel conversions of the Ford F-150 pickup being produced by Livonia, Michigan-based Roush Industries are now legal for sale in California. The California Air Resources Board has made the Roush F-150 the first vehicle to be officially certified to the latest 2004 OBD-II regulations for alternative fuel vehicles. With CARB approval, the propane F-150 conversion is now available for sale in all 50 states for 2007 and 2008 model F-150s. Roush is currently working on a version of the kit for the 2010 F-250 and F-350 Super Duty pickups along with CARB certification. The propane conversions are targeted primarily at commercial fleet customers who often operate these trucks and are able to refuel at central depots.