Kind of meaningless I guess .... but this copper recored, four core OEM unit I have setup on the test stand with my newly rebuilt engine has a phenomenal temperature drop from inlet to outlet ... that's with no shroud and the fan about 4" away from the radiator. With an inlet temp about 160 the outlet is almost cool to the touch.
Looking down the filler neck the difference between between "before" and "after" the recore was astounding .... easily twice or three times the flow coming out of the tubes.
Admittedly it's probably more expensive to copper recore an original unit than it is to buy a new aluminum piece (cost me about $530) but the recored originals do work tremendously ... so just saying, I think probably 90+% of the people comparing OEM to aftermarket aluminum are comparing a 40 year old radiator to a new one .... not really a fair comparison.
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