Wilwood 261-13269-BK 1in Tandem Master Cylinder Kit Universal Brake System

Vehicle Fitment

• Universal Fit (Custom brake system applications)
• Compatible with many classic and performance vehicles using 2-bolt mounting flange (GM / Ford / Mopar patterns)

Fitment Notes

• This is a universal master cylinder kit - vehicle-specific fitment is not assigned
• Compatible with manual or power brake systems
• Requires custom adaptation or verification for pedal ratio, pushrod length, and mounting pattern
• Commonly used in hot rods, muscle cars, restomods, and race vehicles

Features

• Complete tandem master cylinder kit with proportioning valve
• 1.00" bore size optimized for balanced brake pressure
• Lightweight aluminum construction (significant weight savings vs cast iron)
• Black E-coat finish for corrosion resistance
• Dual outlet design separates front and rear brake circuits
• Includes combination proportioning valve for simplified brake bias tuning
• Slotted mounting flange supports multiple OE bolt patterns
• Compatible with disc/disc and disc/drum brake setups
• Precision-machined internals for consistent pressure and pedal feel

Specifications

• Part Number: 261-13269-BK
• Bore Size: 1.00 inch
• Type: Tandem master cylinder (dual circuit)
• Material: Aluminum
• Finish: Black E-coat
• Reservoir Type: Integral dual reservoir
• Reservoir Capacity: 8.0 oz / 4.8 oz
• Stroke: 1.10 inches
• Outlet Ports: Dual outlets (1/2-20 thread)
• Application: Manual or power brake systems
• Position: Brake master cylinder (firewall mounted)

Included Components

• 1x Tandem master cylinder (1.00" bore)
• 1x Combination proportioning valve
• 1x Mounting bracket
• 2x Pre-bent stainless steel fluid tubes
• 1x Hardware installation kit

Product Description

The Wilwood 261-13269-BK Tandem Master Cylinder Kit is a complete braking solution designed for custom and performance vehicle applications. Featuring a 1.00-inch bore aluminum master cylinder, this kit delivers precise hydraulic pressure control while significantly reducing weight compared to traditional cast iron units. The tandem dual-circuit design ensures independent front and rear brake operation, improving safety and reliability in high-performance and racing environments.

This kit includes a combination proportioning valve, mounting bracket, and pre-bent stainless steel lines, simplifying installation and brake bias adjustment. The slotted mounting flange allows compatibility with a wide range of common OE bolt patterns, making it a popular choice for hot rods, muscle cars, and restomod builds. Designed for both manual and power brake systems, it provides consistent pedal feel and reliable braking performance when properly installed and configured.