About 4 or 5 years ago Fluidyne changed from a 3 row core (FHP30-PAN) to a 5 row core (FHP35-PAN).
I have the 3 row core and dual sucker fans (2,600 cfm).
After 34,000 miles and just shy of 7 years, I have never had a problem with overheating or with the radiator leaking.
John
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