I don't have much to add to this thread only that I raced Fiestas back in the day. From 1988-1995, then sold the car. It was raced in NE region in 1996-1998 by the new owner. I'm not sure after that. I did see the car for sale in "SportsCar" about 4 years ago. It was runnig Production at that point.

I broke a 3 hubs over those years. All were the OEM 1978-1980 production hubs. I never broke a BAT sourced hub. Have you tried the VW method of increasing hub life? Over tightening the hub nut. I always did with the BAT hubs and as I said, never broke one.

I still have an old Fiesta front brake rotor sitting aroung. When placed next to my 13 X 1.25 rotors I used on my Mustang Cobra R I just shake my head.