All the race filters bypass oil at a much lower pressure than the standard oil filters do. Do you want filtered oil or not? I do want my oil filtered, not bypassed I found out on a fuel filter that the finer the filter media the harder it is for the pump to suck fuel through it Oil pumps push the oil through the filters so the finer the media the more the interanl restistance to flow in the filter so the internal pressure in the filter will increase making the byapss open sooner and longer When one collasped I would want to know exactly why it collapsed Oil is pushed through the the little holes on the outside edges of the filter and returned to the motor through the big center hole, I can't see or understand how one would collapse I would find out why before running that motor again