Disc Brake kit to fit Super Beetle to 73 1/2. Studs are preinstalled for 911 Alloy Wheels. This is the disc brake kit for the Alloy Mag Purist. the rotors have porsche style 14mm lugs pushed through to accept orginal alloy lug nuts. Shipped with two special rotors with studs, brackets, hardware, grease seals, calipers and brake lines.