Wilwood Adjustable Brake Proportioning Valve

Achieving the perfect brake bias is usually a game of trial and error – unless you have the right hardware. The Wilwood Adjustable Brake Proportioning Valve is a compact powerhouse designed to give you instant, precise control over your rear brake pressure.

Whether you’ve just upgraded to a Big Brake Kit or you’re adjusting for changing track surfaces, this forged-aluminium valve ensures your car stays stable under heavy deceleration by preventing premature rear-wheel lockup

Performance Highlights

• Industry-Leading Reduction: While most valves offer limited tuning, Wilwood’s internal spring and piston design allow for a 57% reduction in line pressure – the highest range available on the market.
• Tactile Precision: The linear adjustment knob features a fine-thread pitch, allowing you to dial in specific pressure between 100 and 1000 PSI with high accuracy.
• Motorsport-Grade Construction: At just 150 grams, this valve won’t bloat your build. The forged billet body is designed to handle the high-vibration environment of a race car chassis without breaking a sweat.
• Universal Plumbing: Out of the box, it features dual 1/8-27 NPT ports. We’ve also included two 3/8-24 inverted flare fittings to make it a direct “plug-and-play” fit for standard 3/16″ hard lines.

Technical Specifications

Is This Right For Your Build?

This valve is the “missing link” for several specific scenarios:

• The BBK Correction: If your new front 6-piston calipers are causing the rear to “dance” or lock up too early, this valve brings the balance back.
• Variable Grip Conditions: Quickly soften the rear bias for rain or low-grip street tires, then dial it back in for sticky track rubber.

Tech Tip: For the best results, mount the valve in a location reachable from the driver’s seat while harnessed in. Being able to adjust bias mid-session as your fuel load lightens is a massive competitive advantage.

Universal fit.

Shipping worldwide.