Product updated on 2021-03-15, RK Sport - RKS:35011000, 2007-13 Sierra 1500, 2007-10 2500/3500 fiberglass ram air hood. , The Hood is functional bringing fresh, cool air directly into the inlet for increased airflow and performance. FITS All 1500 MODELS INCLUDING THE DENALI. FITS HD MODELS (INCLUDING DENALI) UP TO 2010 ONLY. WILL NOT FIT THE 07 1500 HD. Following the lines , 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.