Spectre's Cowl Induction Air Cleaner is a universal open top airbox designed for carburetor and throttle body injection assemblies with a 5-1/8 inch neck. Featuring a powder coated lid and drop base, a red 14 inch by 3 inch tall Spectre HPR synthetic air filter is also included. Designed to seal to the underside of the hood, this air cleaner helps improve performance by isolating the filter while drawing cool outside air from the base of the windshield. With an overall air cleaner height of 4.2 inches, the included drop base lowers the air cleaner to a height of 2.5 inches. Some applications may require the use of an air cleaner riser, part number 4950, to clear fuel inlets or electric choke mechanisms.