YUCHENSHLP Adjustable Brake Proportioning Valve – 3/8–24 Adapters, 150–1200 PSI, Aluminum Alloy

YUCHENSHLP Adjustable Proportioning Valve is a universal, aluminum-alloy brake valve that lets you fine-tune rear/front brake bias for street or track use.

This compact, factory-direct proportioning valve is built for car modifiers and motorsport crews who need reliable, adjustable brake pressure control. Machined from durable aluminium alloy and supplied with two adapters, it accepts a 1/8 NPT inlet and standard 3/8–24 fittings for 3/16" brake line. The large knurled adjuster covers a wide operating range so you can tune brake engagement to suit handling or racing demands.

How does this valve change brake feel and performance?

The valve lets you alter how much hydraulic pressure reaches a portion of the braking circuit, helping prevent premature lockup or overly aggressive engagement on one axle. Adjustments are smooth and repeatable thanks to the knurled control and solid aluminium body. It’s intended for mechanical bias adjustments—not electronic brake systems.

• Adjustable pressure range suitable for motorsport: 150–1200 PSI
• Knurled control for quick, tactile tuning
• Helps balance front/rear braking response under heavy use

What fittings and connections do I need to install it?

The valve ships with two standard adapters and fits common 3/16" brake line when using 3/8–24 adapters. The valve inlet uses a 1/8–27 NPT thread for easy integration into most aftermarket brake plumbing. Drill or mount using the two .250" diameter mounting holes supplied on the body.

• Inlet thread: 1/8–27 NPT for compatible brake lines
• Standard adapters: 3/8"–24 for 3/16" tubing
• Mounting: two .250" diameter holes for secure bracket attachment

Is this valve durable enough for track use?

Constructed from aluminium alloy with precise machining, the unit is designed to withstand repeated adjustments and high-pressure conditions encountered in racing and aggressive driving. Seals and fittings are made to standard dimensions; proper installation and routine inspection will maximize longevity. This is an aftermarket mechanical device for brake bias control—not a replacement for worn lines or damaged components.

• Material: high-strength aluminium alloy body for corrosion resistance
• Pressure capability: rated for 150–1200 PSI when set and installed correctly
• Factory-direct parts and two connectors included in the package

Who is this for? This YUCHENSHLP Adjustable Proportioning Valve is aimed at DIY modifiers, hot-rod builders, and amateur racers who need a simple, mechanical way to tune brake bias. It’s ideal for vehicles using 3/16" brake line and those converting or upgrading brake systems where a compact, adjustable valve is required. Not suitable as a retrofit for vehicles with advanced ABS/ESC systems that prohibit external mechanical biasing; consult a brake specialist if unsure about compatibility.