These are used to block off unused ports in a 4 port master cylinder. Includes one 1/2"-20 Nut and one 9/16"-18 Nut.
GM Master Cylinder Side Plugs 9/16"-18 1/2"-20 Inverted Flare Nut Port Block Off
GM Master Cylinder 1-1/8" Bore, Disc Disc Proportioning Valve Kit, Side Mount
GM Master Cylinder 1-1/8" Bore Disc Disc Proportioning Valve Kit Side Mount
GM Master Cylinder Adjustable Push Rod Kit Universal for 1950-1970 GM Vehicles
Master Cylinder Side Plugs For 9/16"-18 1/2"-20 Inverted Flare Port Block Off
1955-64 GM Master Cylinder for Drum Brakes
