Wilwood adjustable proportioning valve knob-style M10 x 1.0 BF clear anodize — 100–1000 psi

The Wilwood 260-12627 is a knob-style, adjustable proportioning valve with M10 x 1.0 BF fittings that lets you fine-tune brake line pressure between front and rear circuits.

This compact aluminum proportioning valve is built for vehicle braking systems where precise pressure distribution is required. Finished in clear anodize, the valve uses inverted flare bubble (BF) M10 x 1.0 female inlet and outlet ports and provides a user-adjustable range from 100 to 1000 psi. The knob-style actuator offers intuitive, incremental adjustments for track days, towing, or setup changes without disassembling lines.

How does this valve change brake balance on the road or track?

Turning the knob alters the pressure transmitted to the secondary circuit, allowing you to move bias toward the front or rear as conditions demand. Adjustments are smooth and measurable, making it easier to dial in braking behavior for different loads, tire grip levels, or performance settings.

• Adjustable range: 100–1000 psi for fine control
• Knob provides repeatable, tool-free tuning
• M10 x 1.0 BF ports integrate with inverted flare bubble fittings
• Aluminum construction reduces weight and resists corrosion

What fittings and connections does it use?

The valve accepts 10 mm x 1.00 inverted flare bubble female fittings on both inlet and outlet sides. That specification makes it compatible with common performance brake hose and hardline adapters used in aftermarket and custom brake plumbing.

• Inlet: M10 x 1.0 female inverted flare bubble
• Outlet: M10 x 1.0 female inverted flare bubble
• Designed for standard inverted flare brake lines and adapters
• Universal-fit orientation for flexible mounting options

How durable and serviceable is the unit?

Machined from aluminum and finished with clear anodizing, the valve resists corrosion and maintains appearance under typical automotive conditions. The knob mechanism is designed for repeated adjustments; internal components are accessible for inspection or replacement if required by extended use or motorsport service schedules.

• Lightweight machined aluminum body with clear anodize finish
• Robust knob-style actuator for frequent tuning
• Serviceable design—service intervals depend on vehicle use
• Meets fitment needs of universal and custom brake systems

Who is this for?

This Wilwood proportioning valve is intended for enthusiasts, fabricators, and professional mechanics who need adjustable brake bias in aftermarket or custom brake systems. It suits performance street cars, track and rally vehicles, light trucks used for towing, and any build where a compact, easy-to-adjust proportioning solution is required. Installers should be comfortable with brake-line fittings and proper bleeding procedures to ensure safe operation.