{"product_id":"wilwood-adjustable-proportioning-valve-knob-precise-brake-balance","title":"Wilwood Adjustable Proportioning Valve Knob - Precise Brake Balance","description":"\u003cp\u003eIn this review the Wilwood Adjustable Proportioning Valve Knob is evaluated for drivers and builders who need precise front-to-rear brake balance. The bottom line: this compact, forged billet valve delivers a wide \u003cstrong\u003eadjustment range\u003c\/strong\u003e and solid build quality that makes it a practical upgrade for modified brake systems or rear disc conversions, providing up to a 57% maximum decrease in rear line pressure to fine tune braking behavior.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable proportioning valve:\u003c\/strong\u003e Allows precise control of how much rear brake pressure is reduced to balance braking between front and rear axle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide pressure range:\u003c\/strong\u003e Pressure adjustments span from 100 to 1000 PSI, giving the installer a large usable window for tuning brake bias.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh reduction capability:\u003c\/strong\u003e Provides up to a 57% maximum decrease in line pressure, the most reduction offered among comparable valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact forged billet design:\u003c\/strong\u003e The durable, lightweight construction keeps weight down at 5.2 ounces while offering mechanical strength for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-thread adjuster knob:\u003c\/strong\u003e Enables incremental tuning so users can make small changes to braking feel without overshooting the desired balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon fittings supplied:\u003c\/strong\u003e Ships with two 1\/8-27 NPT to 3\/8-24 inverted flare female fittings to accept most domestic 3\/16 in hard brake lines.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Wilwood proportioning valve is aimed at enthusiasts, fabricators, and mechanics who modify brake systems or convert to rear disc brakes and need a reliable way to tune brake bias. Its wide \u003cstrong\u003eadjustment range\u003c\/strong\u003e and precise knob make it especially useful on vehicles where the rear axle now reacts very differently after upgrades.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include owners of factory stock brake systems who never plan to change line pressure or drivers looking for an electronic or automatic proportional solution; this is a manual, mechanical adjuster best suited to hands-on setup and occasional retuning.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStrong, lightweight forged billet construction that supports long-term use.\u003c\/li\u003e\n\u003cli\u003eBroad 100-1000 PSI adjustment with fine-thread knob for precise tuning.\u003c\/li\u003e\n\u003cli\u003eGood value and improved braking performance reported by customers after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManual adjuster requires the installer to tune and recheck bias rather than an automatic system.\u003c\/li\u003e\n\u003cli\u003eFit has received mixed feedback on some installations, so check line fittings and mounting before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eAdjustable proportioning valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure adjustment range\u003c\/td\u003e\n\u003ctd\u003e100-1000 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum pressure decrease\u003c\/td\u003e\n\u003ctd\u003eUp to 57% reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e5.2 ounces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet\/outlet ports\u003c\/td\u003e\n\u003ctd\u003e1\/8-27 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded fittings\u003c\/td\u003e\n\u003ctd\u003eTwo 1\/8-27 NPT to 3\/8-24 inverted flare female fittings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eTwo 0.25 in side holes spaced 1.00 in apart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Wilwood Adjustable Proportioning Valve Knob is a practical, well-built mechanical solution for anyone tuning braking balance after modifications. Its wide adjustment range, precise knob, and durable billet construction make it good value for fabricators and enthusiasts who prefer a manual, dependable method to dial in rear brake pressure.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this fit standard hard brake lines?\u003c\/strong\u003e\u003cbr\u003eYes, it includes two 1\/8-27 NPT to 3\/8-24 inverted flare female fittings that work with most domestic 3\/16 in hard brake lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much pressure adjustment is possible?\u003c\/strong\u003e\u003cbr\u003eThe valve allows adjustment between 100 and 1000 PSI and can reduce line pressure by as much as 57%.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation difficult?\u003c\/strong\u003e\u003cbr\u003eInstallation is straightforward for someone comfortable with brake plumbing, but verify mounting space and fittings since some users reported mixed fit depending on their setup.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":48201592602843,"sku":"B002G37IEA","price":53.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/41_U60B0GSL._AC_SL1200.jpg?v=1770207476","url":"https:\/\/gearmusthave.com\/products\/wilwood-adjustable-proportioning-valve-knob-precise-brake-balance","provider":"GearMustHave","version":"1.0","type":"link"}