This 1967-1970 Mustang 9" Black Single Diaphragm Brake Booster includes Push Rod & Check Valve and is an exact duplicate of the original finish
The 9" booster requires 18" of vacuum to operate properly. With this vacuum level the booster will produce a maximum pressure output of 1100 psi with a 1" bore master cylinder. This pressure level will work great for disc/drum vehicles.
This booster is recommended for heavy disc brake cars.