BAF103A - 9 1/2" Rear Drum Brake Wheel Cylinder Mounting Bolts, 4 pc Set. - Does Both Sides Replacement for: 1964-72 A-body, , , , 1967-69 F-body, , 1968-74 X-body, , , , 1970-81 F-body, , 1973-77 A-body, , , , 1964-72 Elcamino, 73-77 Elcamino 1970-72 , 69-72 All other GM Cars with 9 1/2" rear drum brakes. This is for 4 factory correct wheel cylinder bolts. These are the bolts that hold the wheel cylinders into the backing plate. They are for either front or rear. These are exact to factory with the correct head marking and silver zinc plating.