5/8in Master Cyl. Girling

The WILWOOD 5/8in Master Cylinder Girling (model 260-2636) is a compact hydraulic brake master cylinder engineered for high-performance braking systems that demand precision control and reliable pressure modulation. This 0.625-inch bore unit delivers the stroke length and integral reservoir design required for consistent pedal feel across demanding driving conditions, making it a core component for custom brake builds, race applications, and vehicles requiring OEM-quality hydraulic actuation with a compact footprint.

The master cylinder features a 1.400-inch stroke that generates precise pressure curves for both street and competition use. Its aluminum construction with natural finish provides weight savings while maintaining structural integrity under repeated thermal and pressure cycling. The integrated reservoir eliminates the need for remote fluid storage, simplifying bracket requirements and reducing overall assembly complexity. This design is particularly valued in retrofit installations where space constraints demand a self-contained hydraulic unit. The verified specifications—0.625-inch bore, 1.400-inch stroke, and integral reservoir—combine to deliver the pressure characteristics needed for progressive brake modulation without excessive pedal travel.

Technicians and builders select Girling-style master cylinders when OEM applications or specific brake system configurations demand European-standard bore and stroke geometry. The compact proportions make this cylinder suitable for vehicles where engine bay or firewall space is limited. Its lightweight aluminum body reduces unsprung mass compared to cast-iron alternatives, a benefit recognized in performance driving where every pound of brake system weight affects overall vehicle dynamics. At 1.31 lbs, the unit integrates easily into restoration projects, street rods, and race-prepared vehicles requiring compatibility with Girling brake system specifications.