Can I Use My Stock Master Cylinder, Or Do I Need A New One ?

You might be able to use it but will need to check brake pressures. We recommend a brake pressure test gauge, like our P2360, when you are altering the brake system to ensure safe operation. The gauge includes an adapter that will temporarily replace the bleed screw in our calipers. The 1/4″-28 UNF will fit many other Drag race calipers as well. In most applications, the factory combination valve located on the frame rail will be incorrect and can cause some serious problems. It is only correct for the vehicle as it left the factory. The worst case is if the vehicle previously had drum brakes. Drum brakes operate at much lower line pressures than disc brakes and may utilize an integral residual pressure valve. This would cause the disc brakes to be ineffective, drag, and burn rotors.

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