Required when converting a 79-93 Mustang to disc brakes (to seal the factory prop/combination valve). Full color instructions. New O-ring (don't be forced to use your old one).
General fit Adjustable proportioning valve Fox Mustang
79-93 Fox Mustang Rear brake brackets for Cobra 11.625" conversion Fox axles
GM PROPORTIONING PROP VALVE METERING VALVE CAP COVER
Wilwood 260-13190, Kit Black Aluminum Prop Valve W/ Tandem M/C Mounting Bracket
Racing Power R4511, One Chrome Prop Valve Only Aluminum Performance Racing Part
Baer Brakes 2000057RP, Kit Black Aluminum Remaster Adjustable Prop Valve Perform