CUSCO 6A5 561 A Brake cylinder stopper for SUBARU WRX S4 ymm_36 On vehicles with factory AFM

On vehicles with factory AFM valves

with its supercharged 163-HP engine making it well-suited for a T-304 stainless steel Cat-Back exhaust system

Enables optimal suspension movement with precise geometry alignment

100% All Aluminum TIG-Welded Construction

CUSCO 6A5 561 A Brake cylinder stopper for SUBARU WRX S4 ymm_36 On vehicles with factory AFMBrake Cylinder Stopper, designed to stabilize the brake master cylinder. Upon hard braking, the sheet metal of the firewall to which the brake master cylinder is attached to, flexes immensely from hydraulic pressure and applied human pedal force. Works effectively with factory brake systems and or upgraded units. This modification will effectively result with improved brake feel and quicker pedal response. Various Brake Cylinder Stoppers are also