If you have ABS, then none of them will lock-up. If you don't have ABS, then you better upgrade the fronts as well or you will lock the rears easily before the fronts. It is easier to throw the back around without ABS than with ABS, but you need to carry a little speed into your turn under braking to make that happen, either way.
If interested, PM me, I have a set of new SVT front brakes complete (knuckles with bearings/hubs loaded, calipers/brackets, rotors, pads), and a set of used SVT rear brakes (calipers/brackets), but you will need to rebuild them and get new spindles, dust shields (not critical) and e-brake cable.
If interested, PM me, I have a set of new SVT front brakes complete (knuckles with bearings/hubs loaded, calipers/brackets, rotors, pads), and a set of used SVT rear brakes (calipers/brackets), but you will need to rebuild them and get new spindles, dust shields (not critical) and e-brake cable.