Product information updated on 2021-06-26 Manufactured by RK Sport - Part Number RKS:29012000, 2003-05 Silverado Ram Air Hood. See notes for complete application listing., The Hood is functional bringing fresh, cool air directly into the inlet for increased airflow and performance. Following the lines of the OE hood, our engineers designed the Truck & SUV Hood. The Hood is crafted from hi-temp, hand laid fiberglass for ex, 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.