WARNING: various USA based ‘manufacturers’ are selling Chinese KNOCKOFFs of the Australian MagneFine inline magnetic filter. These Chinese filters can fail (leak or the cap breaks off), and possibly damage your transmission.
Note: Even an Original Magnefine filter can weep at the screw on cap (case) seam.
Some web links to forum discussions. Magnefine knockoffs - Leaks and other problems to look out for:
Found some additional information on the Magnefine filter. Manafacture Tech Quote: "The Magnefine at 35microns does not restrict flow any more than adding approx 1 foot of hose into a line so it is insignificant"
The 5/16 - inch version has been tested @ 7GPM with the larger 3/8 and 1/2 inch versions flowing more. Filter area is approximately 49 square inches.