Quote Originally Posted by ginganggooly View Post
Copying the dimensions and machining the right size gears is one thing, using the right compounds, seals, bearings clearances and whatever else is another matter entirely. Well, thats my take on things.
that goes for any "copy" piece made in the PRC or similar.
You can make a mould of anything but its the materials used and ofcourse small shortcuts left in that maketh the quality durable item.

Thankfully the OBX item/s are copies of the quaife yes , but its not too complicated in design so there have been only minor issues ( for example the D series units not lining up with the driveshaft splines etc)