Product updated on 2019-07-04, RK Sport, RKS:29013000, Does not fit the 2500/3500 HD. Add a K&N intake to make it functional. The Hood is fully functional bringing in fresh, cool air directly to the inlet for increased airflow and performance. The Hood is crafted from hi-temp, hand laid fiberglass for exce, 2007 to 2013 Silverado 1500 Ram Air HoodFollowing the lines of the OE hood, our engineers designed the Silverado Ram Air Truck Hood. 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.