Filter has a bypass built in so it only filters a portion of the fluid each time to allow proper flow. Standard screw clamps are all that is needed. I spent a good deal of time with their engineers @ SEMA as it seems like such a simple but effective solution. There are other filters out there but they don't incorporate a bypass valve and use inferior filter media. Good question!
http://www.epntz-filter.com/sect2a.asp