K&N 61-4520 4.0inch High Flow Control Air Cleaner For 4 Barrel Holley Carburetors

This air cleaner was designed for those installations with the carburetor mounted high against the hood. An engine that requires 700 CFM or more to develop a certain level of power just will not work with hood clearance that will only allow 450 CFM. There are race cars with less than 1/2inch between the hood clearance that will only allow 450 CFM. There are race cars with less than 1/2inch between the hood and the vent tubes of the carburetor. This model Flow Control is as low as is recommended to assure maximum air flow. In fact, it was necessary to enlarge the diameter to 16inches to get the proper approach to turn the corner.