The Disc/Drum proportioning valve has a zinc finish. Disc Drum Proportioning Valve with Side Mounting Kit. Zinc 8" Power Brake Booster. The 4 port master cylinder in this kit has 1" Bore. Zinc 4 port (9/16" and 1/2") Master Cylinder with 1" Bore.
NICE UNIVERSAL 8" POWER BRAKE BOOSTER + 1" BORE CORVETTE MASTER 9/16 & 1/2 PORTS
Dual Diaphragm 8" Power Brake Booster Chrome Universal Hot Rod Universal GM
Dual Diaphragm 8" Power Brake Booster BLACK Universal Hot Rod Universal GM
Dual Diaphragm 8" Power Brake Booster BLACK FACE Universal Hot Rod Universal GM
Dual Diaphragm 8" Power Brake Booster BLACK OUT Universal Hot Rod Universal GM