Distant, when datalogging i noticed a huge difference in my supercooler(thanks woody), and the LET unit...we are talking like 30-40 degrees less with the supercooler. This was determined by readings via the dash daq on a buddys car(LET HE) and then directly on my car(Supercooler). Now just to keep all considerations fair i had the johnson pump and he had stock pump so take this fwiw. Not sure if that made any difference.