Willwood master cylinder

Wilwood Master Cylinder – Hydraulic Handbrake & Pedal Box

The Wilwood Master Cylinder is a compact, high-quality hydraulic master cylinder manufactured by Wilwood Engineering, designed for use in motorsport handbrake systems, pedal box brake circuits, and dedicated hydraulic clutch or brake assemblies. Available in 0.625-inch and 0.7-inch bore sizes, the Wilwood master cylinder is widely used in rally, circuit, and drift applications where precise, consistent hydraulic pressure output is essential.

As a trusted component in professional motorsport hydraulic systems, the Wilwood master cylinder is compatible with most aftermarket hydraulic handbrakes, dedicated brake bias bars, and custom pedal box setups used in competitive motorsport.

Key Features & Benefits

• Available in 0.625″ and 0.7″ bore sizes – bore size determines the pressure output-to-stroke ratio; the 0.625″ bore generates higher pressure per stroke, while the 0.7″ provides greater fluid volume per stroke for applications requiring more travel
• Wilwood Engineering quality – Wilwood is a well-established American manufacturer with a long history in motorsport brake components, providing confidence in product consistency and fluid compatibility
• Compact form factor – designed for integration into tight motorsport chassis and pedal box assemblies where space is limited
• Suitable for hydraulic handbrake use – a direct, commonly-used master cylinder for hydraulic handbrake systems in rally and drift applications
• Suitable for pedal box brake circuits – compatible with dedicated motorsport pedal box hydraulic brake systems requiring a separate rear bias circuit
• Standard AN fitting compatibility – designed for use with standard motorsport hydraulic line fittings

Available Options

The Wilwood master cylinder is available in two bore sizes.

• 0.625″ bore 
• 0.7″ bore 

Materials & Construction

• Aluminium alloy body – machined aluminium master cylinder body for lightweight integration in motorsport chassis applications
• Internal sealing and piston assembly – precision internal components for consistent hydraulic pressure output and long service life with standard DOT brake fluid

Applications

• Hydraulic handbrake system master cylinder (rally, drift, stage motorsport)
• Dedicated rear brake circuit in motorsport pedal box assemblies
• Custom hydraulic brake bias setups
• Replacement master cylinder in existing Wilwood brake system installations

Why This Master Cylinder Is Important

In motorsport hydraulic systems, the master cylinder bore size directly controls the balance between pedal force and braking pressure. Selecting the correct bore for a given application — whether a hydraulic handbrake or a brake bias circuit — is essential for achieving the desired hydraulic feel, modulation, and response. The Wilwood master cylinder is a proven choice in these applications, offering predictable performance characteristics that experienced drivers and engineers can set up with confidence.

Technical Information

• Product type: Hydraulic master cylinder
• Manufacturer: Wilwood Engineering
• Available bore sizes: 0.625″ and 0.7″
• Intended use: Hydraulic handbrake systems, motorsport pedal box brake circuits
• SKU: WW
• Condition: New