These GM single diaphram brake boosters suit 1964-1972 GM A-F-X body cars and features a 9″ outside diameter booster which can produce up to 1000 PSI with 18″ of vacuum. A firewall mounting plate is included and they are available in a variety of finishes.

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• Master cylinder bolt patern = 3-3/8″ square bolt pattern

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• Great replacement or addition to your manual brake car

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