510 Dual Master Cylinder & Balance Bar Assembly   Need to modify the stock pedal box by installing balance bar in the stock brake pedal  and modifying and re-enforcing pedal box to accept two master cylinders side-by-side.  Mounts in the same location of the stock pedal assembly.  Firewall needs to be opened up to sandwich the firewall between pedal box and master cylinders.  The size of the master cylinders are determined by what brakes are on the car.  Kit includes master cylinder fitted to your pedal bracket (core required). A plate to weld to the firewall is available separately.