Abstract: A liquid pressure braking system for a vehicle has a master cylinder which is connected to the brake operating motor cylinder on each front wheel of the vehicle through a respective liquid pressure intensifier. Each intensifier has a differential area piston. The differential liquid pressure on the piston, which tends to close the valve and render the intensifier effective to increase the liquid pressure at its outlet as compared with its liquid pressure inlet, is opposed by a spring which reacts against a stepped plunger. The plunger projects towards a link 18 of a mechanism which interconnects suspension components of the two front wheels.