yeah the filters were installed upside down that is not how it's installed into a vehicle..That is the one that Project Farm on YouTube tested and won.
the one tested was the oilbased cotton one, which worked very well in my impala which had powdered dirt caked on it when i cleaned it.. with about 15k-20k miles
The ac delco had no dirt caked on... so was it even filtering?
he should have used an actual nbs air box to test it with those NBS air boxes have a pressure flow meter as well
i cleaned my airbox before reinstalling it so we can have a baseline i'll check it in 4,000 miles and report back
i do wonder if the air box was clean every time it was changed with the flour test
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