Wilwood High Volume Tandem Master Cylinder - 7/8 inch Bore, Black Finish with Pushrod

Wilwood’s 7/8" or 15/16" bore Tandem Aluminum Master Cylinders available in 3 finishes, plain, ball burnished, and black e-coat. These master cylinders are designed primarily for manual applications and include a pushrod. They’re designed for mount flanges from 3.22” to 3.40”, common measurements for most domestic cars and trucks from the mid 1960s to present, and offer fluid outlet ports on both sides of the bore. The stroke is set at 1.10” with a volume ratio of 2:1 between the primary and secondary chambers. Machined from high-pressure die castings, each master cylinder weighs only 3lbs, a 75% weight savings over most cast iron OE type master cylinders. We also offer a combination proportioning valve kit, which includes brackets and stainless lines specifically for use with this master cylinder, see PN 260-13190, or 220-13189 for retrofit kit.

The Wilwood high volume tandem master cylinder, part number 260-9439-BK, is engineered for performance and reliability in manual brake systems. Crafted from high-pressure die cast aluminum, this master cylinder offers significant weight savings—approximately 75% less than traditional cast iron models—making it ideal for racing and custom applications. The black e-coat finish provides corrosion resistance and a sleek appearance, suitable for a variety of automotive environments. Designed primarily for manual applications, this master cylinder includes a pushrod and features a 1.10-inch stroke with a 2:1 fluid volume ratio between primary and secondary chambers, ensuring consistent brake pedal feel and reliable fluid delivery. It is compatible with mount flanges measuring from 3.22” to 3.40”, a common size range for most domestic cars and trucks from the mid-1960s to present. Fluid outlet ports are positioned on both sides of the bore, facilitating versatile plumbing options. This component is perfect for custom builds, restorations, and performance upgrades, providing durability and precise control in demanding conditions. For enhanced functionality, Wilwood offers a combination proportioning valve kit, including brackets and stainless lines, specifically designed for use with this master cylinder, improving brake balance and safety. Whether upgrading an existing system or building a new setup, this master cylinder delivers high performance with straightforward installation and dependable operation.

Features:

• Bore size: 7/8 inch for high volume fluid flow

• Constructed from high-pressure die cast aluminum for strength and weight savings

• Black e-coat finish provides corrosion resistance and aesthetic appeal

• Includes pushrod for manual brake applications

• Designed for mount flanges from 3.22” to 3.40” to fit most domestic vehicles

• Stroke length of 1.10 inches ensures consistent pedal feel

• Fluid outlet ports located on both sides of the bore for flexible plumbing

• Lightweight design weighing only 3 lbs, ideal for racing and performance vehicles

• Compatible with Wilwood proportioning valve kits for enhanced brake control

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1