This spin-on oil filter from K&N is perhaps the best filter available. It traps particles down to 10-20 microns in size, and flows 12-16 GPM. A very handy feature is the hex nut on the end that enables the filter to be removed with a socket. It is even drilled for safety wire. Replaces any spin-on filter except for front radiator MPi Mini.
See GFE0280 for 1997-2000 Minis.