Product updated on 2021-03-15, RK Sport - RKS:35016000, 2014-2018 Sierra 1500 Ram Air Hood. , Ram Air hood with louvers. Installs using all the factory hardware and comes Gray Gel Coat. This hood is ducted inside the engine bay and is functional, 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.