This is meant particularly for Rich H. I notice that a knock off of Racor filters is available from Griffin Filtration out of Singapore. Apparently Griffin parts and filter cartridges are interchangeable with Racor parts. The Griffin filters are about 1/3 the cost of Racor stuff. My question is, has anyone had experience with these filters? See:http://www.griffinfilter.com/showroom.asp?uid=38&name1=TURBINE+SERIES&top_id=3