These Brake and Clutch Master Cylinders are manufactured to OEM specification
GMC171 Original Brake Master Cylinder Mini
GMC172 Brake Master Cylinder Mini Cooper S
AAU4969 Clutch Master Cylinder
These Brake and Clutch Master Cylinders are manufactured to OEM specification Part Number and as such are homologated for use on original specification vehicles using DOT 4 or DOT 5 Hydraulic Fluid as specified in the vehicles Handbook/Workshop Manual. The Master Cylinders are NOT homologated for the use of any other type of fluid. This includes racing fluids such as Castrol SRF Hydraulic Fluid