Mini (UK) 4 port pressure regulating valve (as fitted to tandem master cylinders)
FAM7821- BRAKE LIMITER VALVE 77 ON (FITTED IN ENGINE BAY)- 4 PORT
This twin line brake valve is fitted on the front baulkhead of the engine bay from 1978 on as opposed to the single line valve which was fitted on the rear subframe. known as PWDA valve. This has two inlets and two exit holes.