Designed for carburetor and throttle body injection assemblies with a 5-1/8 inch neck, Spectre's cowl tray style air cleaner assemblies come with a 3, 4 or 5 inch tall HPR air filter. These air filters are available with our red, blue, black or white media. In addition, these assemblies come with a triple chrome plated, a powder coated or Extraflow air filter lid. The powder coated drop base lowers the air cleaner, resulting in an overall height of 2.5 inches from the carburetor flange to the air box sealing edge. The universal open top air box base with cowl tray is designed for cars and trucks with cowl style hoods so that they seal to the underside of the hood and firewall, drawing cool outside air from cowl hood and from the base of the windshield.