Our upgraded V2 Billet Brake Caliper Adaptor Bracket is a perfect addition to our Lightweight Rear Staging Brake Kit, replacing the V1 brackets. This new version includes two speed sensor mounting options for quick and easy installation of an M DHALL 437 sensor (sold separately). With precise CNC machining from 6061-T6 billet aluminum and a black anodized finish, our bracket is highly durable and resistant to corrosion. It also features SpeedFactory "SFR" logos for a professional touch. The 11-toothed slotted steel rear staging brake rotor works with a Hall effect sensor to accurately measure ground speed for your Engine Management Software. *Note: If you have our V1 bracket without sensor holes, purchasing just one of these brackets will suffice. (For use with SpeedFactory Racing AWD / FWD Lightweight Rear Staging Brakes Kit)