Product information updated on 2021-06-26 Manufactured by RK Sport - Part Number RKS:19011000, 04-08 F150 Big Sky Ram-Air Hood., The F-150 Hood is crafted from hi-temp, hand laid fiberglass for exceptional strength and durability. Following the lines of the OEM hood, our engineers designed the Big Sky Hood. The F-150 Hood is functional bringing fresh, cool air directly into the i, 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 install a cold air intake or open up the top of your factory air box.