Wilwood High Volume Tandem Master Cylinder - 1 Inch Bore for Automotive Applications

Wilwood’s Tandem Aluminum Master Cylinder is available in 2 bore sizes 1.00” and 1-1/8”; and 3 finishes, plain, ball burnished and black e-coat. 7/8” bore master cylinders are designed primarily for manual applications and include a pushrod. The 1” bore can be used in manual and power assisted applications and does not come with a pushrod. The 1-1/8” bore is designed for use primarily with power brake applications, either from vacuum assist or hydraulic assist systems. 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 our combination proportioning valve kit, which includes brackets and stainless lines specifically for use with these master cylinders, see PN 260-13190, or 220-13189 for retrofit kit.

The Wilwood High Volume Tandem Master Cylinder (Part No. 260-8555) is engineered for reliable braking performance across a variety of vehicle setups. Crafted from high-pressure die cast aluminum, this master cylinder provides a lightweight, durable alternative to traditional cast iron units, weighing only 3 pounds to reduce overall vehicle weight and improve handling. Its design features a 1-inch bore size, making it suitable for both manual and power-assisted brake systems, with a stroke length of 1.10 inches and a fluid volume ratio of 2:1 between primary and secondary chambers. The master cylinder includes a pushrod for manual applications and is compatible with mount flanges measuring from 3.22 to 3.40 inches, common among most domestic cars and trucks from the mid-1960s onward. It offers fluid outlet ports on both sides of the bore for flexible installation options. The unit is finished in black e-coat for corrosion resistance and durability. To optimize braking system performance, Wilwood also offers a comprehensive combination proportioning valve kit, including brackets and stainless lines designed specifically for use with this master cylinder (see PN 260-13190 or 220-13189 for retrofit kits). Whether upgrading existing brakes or building a custom setup, this master cylinder delivers high-volume hydraulic flow, ensuring responsive and consistent braking pressure in both manual and power brake configurations.

Features:

• Bore Sizes: Available in 1.00 inch (manual and power-assisted applications) and 1-1/8 inch (power brake systems)

• Construction: Machined from high-pressure die cast aluminum for lightweight strength and durability

• Weight: Only 3 pounds, offering a 75% weight savings over traditional cast iron master cylinders

• Stroke Length: Set at 1.10 inches for effective hydraulic operation

• Fluid Outlet Ports: Located on both sides of the bore for flexible installation options

• Finish Options: Available in plain, ball burnished, and black e-coat for corrosion resistance

• Mount Compatibility: Fits flanges from 3.22 to 3.40 inches, suitable for most domestic vehicles from the 1960s to present

• Application Versatility: Suitable for manual, vacuum assist, or hydraulic assist brake systems

• Additional Components: Compatible with Wilwood proportioning valve kits for optimal brake system tuning

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