The piston diameter of OEM C9AZ-2140 master cylinders is 1 inch, which is equal to 25.4mm. The dual circuit brake cylinder has two outlet ports in one side, which size is 1/2-20" of primary one and 9/16-18" of secondary one. Here is the other reference numbers: 5472664, 5472969, C7AZ-2140-C, C7AZ-2140-H, C7AZ-2140-M, C7ZZ-2140-C, C9AZ-2140-D, D2AZ-2140-B. It is used in Drum brake system, and the specific application is as following:
Ford 1967-1972 Galaxie
Ford 1967-1970 Mustang
Ford 1967-1970 Cougar
