i think you are mistaken. IMPACT DRIVER SCREWS ARE ON THE REAR ROTORS.the front have a different style,they are bolted to the outer axle hub or bearing cap flange.this flange is held to the rotor with 4 14mm bolts.i have to remove the flange first,it is in front of the rotor.i have never seen this setup before!this is for a 94 EX