Brake Master Cylinder Dual Line with Brake Failure Switch MGB 1976 onward GMC164

Brake Master Cylinder Dual Line with Brake Failure Switch MGB 1976 onward    GMC164

Quality Brake master cylinder for the later rubber bumper MGB GT and Roadster 1976 on.

The GMC164 is built to operate a tandem braking system, meaning it splits hydraulic pressure between front and rear circuits for safer braking if one circuit fails.
Includes brake failure switch (AAU2454) 

The brake failure switch integrates with the master cylinder to monitor hydraulic pressure between the two brake circuits. If one circuit loses pressure (e.g., due to a leak or line failure), the switch triggers a dashboard warning or indicator light. This adds an important safety alert before full brake loss occurs.

Comes without push rod so it is necessary to re-use your old one!!