The Cusco Brake Cylinder Stopper (B.C.S.) for the Subaru WRX/STI is a great way to increase pedal feel. Eliminate the unwanted flex of the brake master cylinder during hard stopping, due to firewall flex. The Cusco B.C.S. is coated blue and bolts on to pre-existing holes, and is and easy install taking only minutes using normal hand tools. This has been specifically designed for Left Hand drive vehicles.