Greg, wasn't that "clarification" since retracted about swaps between the 99-00 NB and 01-05 NB Miatas which the rest of the world considers to be the same cars with different engines and some minor updates to trim and lights?

I agree with tGA, though, a part is either stock (or stock equivalent) or not stock, and only stock is allowed unless permitted to be changed (I.e. brakes).

BUT given the lack of replacement hub availability on so many cars it might be nice to have some sort of allowance for better than stock or at least similar to stock matches, as long as you keep the stock knuckle and bearing OD, who really cares?