Definition of a Function. A function is a relation for which each value from the set the first components of the ordered pairs is associated with exactly one value from the set of second components of the ordered pair. Okay, that is a mouth full.
Master cylinder without booster. Single bore master cylinders: These unboosted hydraulic Master Cylinders are actuated by foot effort, via the brake pedal. The brake pressure is related to actuation force and depends on the piston bore size: the smaller the bore, the higher the pressure.
Replace both master cylinder and brake booster. Check the push rod stamp I.D. code and cross in the CARDONE Catalog. Most single diaphragm boosters are 10 in diameter and 4-1/2 thick. Most dual diaphragms are 9 in diameter and 6 thick.