SKU: TIL72-509
MPN: 72-509
The Adjuster Brake Bias Red 3/8in & 7/16in Coupler (MPN 72-509) is an essential component for drivers who demand precision brake balance control during high-performance driving. This adjustable bias proportioning valve is engineered for track enthusiasts, autocross competitors, and serious street performance builds where front-to-rear brake force distribution must be tuned to match chassis dynamics, tire grip, and suspension geometry. Whether you're dialing in a competition setup or optimizing a modified street car, brake bias adjustment lets you prevent rear-wheel lockup under braking while maintaining maximum front-end stopping power.
This red-anodized adjuster features dual SAE ports—one 3/8-inch and one 7/16-inch coupler—allowing flexible integration into existing brake line configurations without requiring complete system redesign. The precision-machined valve body reduces brake pressure to the rear circuit proportionally, preventing premature rear-wheel lockup that compromises directional control and extends stopping distance. The adjustable design accommodates changes in vehicle weight, brake pad compounds, and suspension stiffness, giving drivers real-time tuning capability without removing the valve or bleeding the system. The compact profile (6.15 x 4.35 x 6.7 inches) and lightweight construction (0.85 lbs) minimize installation complexity and weight penalty.
This brake bias adjuster suits drivers running custom or modified brake systems where OEM proportioning valves no longer match performance requirements. Common applications include rear-wheel-drive sports cars, track-prepared vehicles with upgraded brake components, and suspension-modified cars where geometry changes have altered brake load transfer. Installation requires proper brake line routing to the dual couplers and access to the adjustment mechanism during setup; most installations pair this with a quality brake line kit and professional bleeding procedure. Verify your existing brake line SAE sizes match the 3/8-inch and 7/16-inch coupler specifications before purchase to ensure compatibility with your platform.
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