Brake Master Cylinder .75Bore TR4 TR4A TRW Brand

This is a Original Equipment Manufacture TRW Brake Master Cylinder for a Triumph TR4 to CT5783, .75 bore with a Single Ring around the cylinder with correct metal cap. The later Cars had a .70 bore with two rings around the cylinder. The two cylinders are interchangeable but there will be a increase in pedal travel if the later cylinder is used. Reference 131661 581-060 64067759