Anybody looking to DIY an oil cooler, here's an extremely useful piece:
http://store.bimmerworld.com/e3646-o...kit-p1027.aspx
It basically lets you screw on -10 lines to fit any oil cooler.
I also saw this for the E46 M3s: an oil cooler diverter which diverts 100% of the flow into the oil cooler. Looks similar to the plunger in the E9X ones, but I'm not sure if it actually fits.
http://store.bimmerworld.com/e36e46-...alve-p980.aspx