he says he bought the calipers of ebay so his reg int gunna do anything. cuz he would just read the badge on the back of the car if that was the case haha.
i think the RSturbo had same brakes as xr4x4. i didnt think ther was any differance. although its poss S1 didnt have ABS and S2 did. xr4x4 has abs, might be pad sensors or not