Cumminz: I would probably go with B/D over ATS,simply because of the cost and probably the construction. I know for a fact that BD`s I/C were made right up the street from me @ Griffin Radiator which makes the majority of all Nascar rads. they have a alum. extruding machine thatis used to make the core. If you are not aware tha B D does not R&D alot of their products,but copies other manufactures parts,and reproduces them under their name such as the I/C. I cannot speak of the quality or efficiency of ATS,but I do know they are "PROUD" of thier stuff,if you get my drift.