Other than a few extra / thicker joints / bolts on the BF IRS, the other obvious update is the rear hyme bush, measuring 40 mm, 3 on each side of the rear wheels that adjusts the blade control. The BF ones sits noticebly lower than the BA ones too. I believe there could be minor change to the stiffness on the front/rear control arms on the BF?? Maybe someone can elaborate on that one. It's not just about horsepower and size of the turbo, it's the balance of the car, VE Clubsport is a good example.
