If you don’t want to modify the radiator support in your car but still need the extra cooling capacity for a high horsepower engine, here are some offerings that will do the job. The two 600 hp rated radiators feature a double-row core of 1-1/4” tubes which will fit the stock radiator support without having to enlarge the opening. The two units rated for 400 hp have a double row of 1” tubes and will also fit without the need to modify the radiator support opening.