Quote Originally Posted by crazy_boy View Post
sir, so you mean 4d56, 4m40, and td42's are better since they have the dual filter set up?
Better than a standard single filter system, but then again if your using low quality filters that can't filter efficiency then the difference is not much difference. But in theory it should work. The TD42's that do have the dual system do use a bypass system, They also have two different filter threads one is 3/4 16 and the other is 1-12UNF kinda weird. But I guess it keeps you from mixing up the full flow and the bypass filter.