ROUSH CleanTech has received California Air Resources Board (CARB) approval of its propane autogas fuel system for retrofitting 2010 model year 5.4-liter Ford E-150, E-250, and E-350 cargo vans and wagons. This is the first CARB certification awarded since 2000 for a liquefied petroleum gas retrofit system, and the first CARB certification for any alternative fuel system for retrofit installation on 2010 model year vehicles.