This isn't a post on if they are any good. I have cut them apart and seem decent. What alarms me is how small the screen is inside the throat of the filter. It isn't holes to the fabric like most. It is small perforated slits, that are super small. I can't imagine they don't restrict oil flow and cause the filter to go into bypass. Anyone with Blue Mountain fikters, check it out. I think I may stop using them, even though I am sitting on a bunch. Other than that they seem like normal average filters.