Prop Valve w/ Tandem M/C Mounting Bracket

The Wilwood Prop Valve w/ Tandem M/C Mounting Bracket (SKU WIL260-13190) is a precision proportioning valve designed for custom and performance brake systems where independent pressure control between front and rear circuits is essential. This adjustable proportioning valve serves as the critical balance point in any brake system upgrade, preventing rear-wheel lockup and ensuring predictable, linear braking performance across varying load conditions. Whether you're building a hot rod, vintage restoration, or high-performance street machine, this proportioning valve with tandem master cylinder compatibility delivers the control serious brake engineers demand.

Constructed from durable aluminum, this proportioning valve features dual 3/8-24 inch inverted flare female inlets and outlets, providing reliable SAE connections compatible with standard brake line fittings. The knob-type adjustment mechanism allows technicians to fine-tune pressure output across a broad 150–1200 psi operating range, enabling precise calibration to match your specific master cylinder displacement, wheel cylinder size, and brake pad friction characteristics. The integrated tandem master cylinder mounting bracket streamlines installation and eliminates the need for separate adapter hardware, reducing assembly time and potential leak points. Aluminum construction keeps weight minimal at 1.37 lbs, a critical consideration in weight-sensitive applications where every pound affects handling dynamics.

This proportioning valve excels in street rods, muscle cars, vintage imports, and dedicated track vehicles where factory brake systems fall short of modern stopping demands. The adjustable proportioning function is especially valuable when upgrading to larger front brake components or modifying suspension geometry—conditions that alter brake bias and increase lockup risk. Installation pairs seamlessly with tandem master cylinders, making it an ideal centerpiece for complete brake system overhauls. Brake builders and restoration specialists rely on Wilwood proportioning valves for repeatable, tunable performance that transforms marginal braking into responsive, confidence-inspiring stopping power suitable for everything from weekend cruise nights to competitive driving events.