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1978-1987 Disc Drum Proportioning Valve - Brass 5 Port Valve
This is for stock trucks equipped with factory front disc and rear drum brakes.
Fits the following Chevrolet and GMC Trucks
1978-1987 Chevy / GMC 1/2 ton / 3/4 ton - 2wd / 4wd / Blazer / Suburban
Made in the USA