{"product_id":"wilwood-proportioning-valve-knob-adjust","title":"Wilwood Adjustable Proportioning Valve","description":"\u003cp\u003eThe Wilwood Adjustable Proportioning Valve is engineered for \u003cmeta charset=\"utf-8\"\u003epressure adjustment that is smooth and repeatable, allowing fine tuning from full system pressure down to a maximum 57% reduction, making it ideal for dialing in rear brake bias on custom and high-performance builds.\u003c\/p\u003e\n\u003cp\u003eConstructed from a forged billet aluminum body, the valve benefits from optimized grain flow forging that realigns the alloy’s grain structure for improved strength, tighter machining tolerances, and superior resistance to deflection under high pressure. Compared to traditional block-machined billet valves, the forged design achieves greater strength with less material, resulting in a lighter, smaller, and easier-to-mount valve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Wilwood Adjustable Proportioning Valve\u003c\/li\u003e\n\u003cli\u003e(2) 1\/8\"-27 NPT to 3\/8\"-24 inverted flare female brake line adapters\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Wilwood\u003c\/li\u003e\n\u003cli\u003eValve Type: Adjustable Proportioning Valve\u003c\/li\u003e\n\u003cli\u003eAdjustment Range: 0–57% pressure reduction\u003c\/li\u003e\n\u003cli\u003eEffective Pressure Range: Approx. 100–1,000+ PSI\u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminum \/ Steel\u003c\/li\u003e\n\u003cli\u003eFinish: Clear Anodize\u003c\/li\u003e\n\u003cli\u003eWeight: 5.2 oz\u003c\/li\u003e\n\u003cli\u003eInlet Port: 1\/8\"-27 NPT\u003c\/li\u003e\n\u003cli\u003eOutlet Port: 1\/8-\"27 NPT\u003c\/li\u003e\n\u003cli\u003eMounting Holes: (2) × 0.25\" diameter\u003c\/li\u003e\n\u003cli\u003eMounting Hole Spacing: 1.00\" center-to-center\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with disc and drum brake systems\u003c\/li\u003e\n\u003cli\u003eDesigned for 3\/16\" hard brake lines (with included fittings)\u003c\/li\u003e\n\u003cli\u003eSuitable for street, off-road, drag racing, dirt track, and road race applications\u003c\/li\u003e\n\u003cli\u003eCompact body allows discreet or exposed mounting locations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eTech Insight\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003eA proportioning valve is critical for balancing front-to-rear brake pressure, especially in vehicles with upgraded calipers, mixed brake setups, or altered weight distribution. Wilwood’s forged billet design allows this valve to withstand extreme line pressures while maintaining precise control. With up to 57% pressure reduction, it offers more adjustment range than most competing valves—making it easier to prevent rear brake lockup without sacrificing overall stopping power.\u003c\/p\u003e\n\u003cp\u003eAdjustment Styles\u003c\/p\u003e\n\u003cp\u003eKnob Adjustable\u003c\/p\u003e\n\u003cp\u003eInfinitely adjustable with fine-thread control\u003c\/p\u003e\n\u003cp\u003eTurn fully clockwise for full pressure\u003c\/p\u003e\n\u003cp\u003eRotate counterclockwise to progressively reduce output pressure\u003c\/p\u003e\n\u003cp\u003eLever Adjustable\u003c\/p\u003e\n\u003cp\u003eSix detented positions for quick, repeatable changes\u003c\/p\u003e\n\u003cp\u003eLever at 90° (high cam) delivers full pressure\u003c\/p\u003e\n\u003cp\u003eStep back one click at a time to reduce pressure incrementally\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":52995826483565,"sku":"WIL260-8419","price":53.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/1145\/3037\/files\/WIL260-8419-Wilwood-Adjustable-Proportioning-Valve-Billet-1.jpg?v=1780510947","url":"https:\/\/craneaxle.com\/products\/wilwood-proportioning-valve-knob-adjust","provider":"Crane Axle","version":"1.0","type":"link"}