Wilwood Proportioning Valve 4444/30 (260-11179) — Compact Adjustable Brake Bias Valve, US-Made

The Wilwood 4444/30 260-11179 Proportioning Valve is a compact, US-made brake valve engineered to fine-tune front-to-rear brake bias for improved pedal feel and controlled stopping performance.

Wilwood Engineering has produced performance braking components since 1977. This proportioning valve is built to integrate with high-performance disc brake systems where adjusting hydraulic line pressure between circuits is necessary to optimize braking balance or to compensate for vehicle modifications. The part is packaged small and light, making it easy to carry for trackside adjustments or garage installations.

How does this valve improve braking performance?

The proportioning valve lets you reduce rear brake line pressure relative to the front, preventing rear-wheel lockup and helping maintain predictable pedal response under heavy braking. It doesn't add braking force, but redistributes hydraulic pressure to match vehicle balance and load conditions.

• Adjusts front-to-rear pressure for safer, progressive braking
• Smooth, incremental adjustment for tuning pedal feel
• Simple inline design fits most brake plumbing layouts

What are the practical installation and fit considerations?

This Wilwood valve is compact and designed for in-line placement between master cylinder and wheel circuits; mounting location should remain accessible for adjustment and protected from debris. Use correct brake line fittings and follow torque specs—brake work requires clean assembly and proper bleeding after installation.

• Compact dimensions: 22.86 cm × 18.415 cm × 4.318 cm packaging footprint
• Includes one valve per package, ready to install with appropriate fittings
• Made in the United States and intended for performance brake systems

When should I choose this Wilwood proportioning valve over other options?

Choose this model if you need a straightforward, durable mechanical solution to dial in brake bias for street, track, or modified vehicles. It's ideal when a simple, reliable adjuster is preferred over complex or vehicle-specific electronic systems.

• Best for vehicles upgraded with larger front brakes or changed suspension geometry
• Useful for fine-tuning during testing, track days, or after brake system upgrades
• Compatible with many aftermarket brake lines and Wilwood systems

Who is this for: Enthusiasts, amateur racers, and professional mechanics who work on performance braking systems and need a dependable, adjustable way to set brake bias. If you modify brake components, change tire sizes, or want more precise control over pedal feel and rear lock tendency, this Wilwood proportioning valve is a compact, US-made tool to help you tune braking behavior safely and predictably.