Product updated on 2019-06-18, RK Sport - RKS:18011005, 05-09 Mustang California Dream Ram Air. , Following the lines of the Mustang hood, our engineers designed the California Dream Hood. The Hood is functional bringing fresh, cool air directly into the inlet for increased airflow and performance. *** NOTE: THIS HOOD SHOULD NOT BE USED WITH ANY TYPE , RK Sport Ram Air Hoods are ducted to your factory air cleaner location. Add a cold air intake to make them fully functional. On some models you simply need to cut open the top of your factory air box.