Cast Iron GM Master Cylinder 1-1/8" Bore; 9/16" & 1/2" Chrome Ports left side

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Proflow master cylinders are completely new units with no core charge. They offer a wide variety of designs to provide compatibility with manual brakes as well as power-assisted applications. Dual reservoir configurations with several bore diameters to accommodate front disc/rear drum brakes or 4-wheel disc systems, they are also offered in a variety of finishes and lid attachment styles.

Whether you’re building a brake system from scratch, or updating a vintage system, Proflow probably has what you need for your make and model.


Brand Proflow
Shipping Weight 5.0000kg
Shipping Width 0.300m
Shipping Height 0.200m
Shipping Length 0.250m

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