Type of Turbos on stock FD...
 

Are the stock Twin Turbo Exhausts on the 3rd Gen Rx-7 Ball Bearing Turbos?

If not, what kind are they?

no, they'r typical journal bearing type. they're hitachi ht-12's if i remember right. 55mm turbine and 50mm compressor. don't quote me there, i think that's what i seen somewhere