Wilwood 260-15543-BK Compact Tandem Master Cylinder Bore Black - 1-1/8

The Wilwood 260-15543-BK Compact Tandem Master Cylinder is engineered specifically for 1964-1972 Ford Mustang manual brake applications. This high-performance brake master cylinder features a 1-1/8" bore diameter and comes with the correct pushrod and eyelet for early Mustang and Ford installations.

Key Features:

• 1-1/8" bore diameter for optimal brake performance
• Black e-coat finish for corrosion resistance and durability
• Includes correct pushrod for factory 1964-1972 brake pedal
• Dual fluid outlet ports on both sides of bore for flexible installation
• Designed for mount flanges from 3.22" to 3.40" (matches factory manual master cylinder mount)
• 1.10" stroke with 2:1 volume ratio between primary and secondary chambers
• Machined from high-pressure die castings for strength and precision
• Weighs only 3 lbs—75% lighter than most cast iron OE master cylinders

This compact tandem master cylinder is designed primarily for manual brake applications and is compatible with Wilwood's proportioning valve kits (PN 260-14248 for left-hand outlets or 260-15667 for right-hand outlets) for complete brake system upgrades. The lightweight aluminum construction and dual-circuit design provide reliable braking performance while significantly reducing unsprung weight.