Wilwood Master Cylinder Compact 1-1/8” Bore Black With Proportioning Valve/ Passenger Side Bracket Mustang 1965-1973

Measuring 6.55 inches from mounting flange to end, this Black 1-1/8-inch Bore Master Cylinder (260-15666-BK) is a compact upgrade for your classic 1965-1973 Mustang. Wilwood includes a Proportioning Valve and a Passenger Side Bracket, ensuring a convenient bolt-on installation that's ideal for manual brake systems. Take advantage of improved brake pressure actuation and fluid control in a tight package that allows for additional clearance.

Features and Benefits:
- Compact Design for Extra Clearance
- Aluminum Construction
- Black Finish
- 1-1/8-inch Bore
- Includes Proportioning Valve and Mounting Bracket
- Proudly Manufactured in the USA! 

The master cylinder features a slotted flange mounting and a pushrod clevis end and includes fluid tubes and mounting hardware to further ease the installation process. The fluid tubes are constructed of precision-bent stainless steel and include preinstalled plated steel tube nuts. The fluid tubes will bolt on between the proportioning valve and the tandem chamber master cylinder. 

Designed for Mustangs with custom brake systems, the combination proportioning valve hastens wiring and brake proportioning adjustments. The combination block is optimized for the tandem chamber master cylinder and will maintain complete isolation between the front and rear fluid circuits. The proportioning valve and passenger side bracket are each finished in a black E-coat for protection and durability. Wilwood includes stainless steel button head fasteners that will thread effortlessly into the bracket. 

Please Note: The adjustable proportioning valve will mount on the right-hand side of the master cylinder.