Radiators: Is 22" enough for 400 HP?

Eastwood company is marketing a radiator they advertise as a tri flo model. Claims your coolant will be 25 degrees lower using this radiator. Basically the is sectioned off 1/3 of the way down on one side and 2/3 on the other. The theory is since it is a cross flow model the coolant has a total of 3 passes thru the cooling area.
They have been selling them $200 all sizes. 22" 26" and 28" are available