Brake Load Compensator / Force Regulator / Bias Valve Info
From THE Corrado Forum Knowledge Base
On 4 Cyl cars the OEM Part is made by ATE part number 320109 (VAG 357 612 151)
VW Spares sell this for about half the price of VAG - Look under mk2 Golf to find it.
If you are changing this it's also worth getting the spring and bracket from VW (each about a fiver) and also new Bolts / Nuts
After installing make sure you coat the mech with lots of white lithium grease.
The VR6 part is different. (1H0 612 151C)