{"product_id":"powerworks-pv4-proportioning-combination-valve-for-disc-disc-brakes-brass-5-port-adjustable-mounting","title":"POWERWORKS PV4 Proportioning Combination Valve for Disc\/Disc Brakes — Brass 5-Port, Adjustable Mounting","description":"\u003cp\u003e\u003cstrong\u003eThe POWERWORKS PV4 is a universal brass proportioning combination valve engineered to balance hydraulic pressure between front and rear disc brakes and reduce rear-wheel lock-up.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, service-ready valve is a five-port solution for vehicles fitted with disc brakes at both axles. Made from high-quality brass for corrosion resistance and thermal stability, the PV4 accepts common master cylinder and brake line fittings and can be mounted left, right or bottom to suit installation requirements. It’s intended for classic trucks, muscle cars and many modern vehicles that need simple, reliable proportional braking control without replacing the master cylinder.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the PV4 improve braking balance on disc\/disc systems?\u003c\/h3\u003e\n\n\u003cp\u003eBy altering hydraulic flow to the rear circuit, the PV4 reduces the chance of rear-wheel lock-up under heavy braking. The valve proportionally reduces rear pressure relative to the front, helping maintain stability during sudden stops while preserving front braking performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFive-port combination design separates front, rear and master cylinder connections\u003c\/li\u003e\n  \u003cli\u003eCalibrated internal passage reduces rear line pressure during firm braking\u003c\/li\u003e\n  \u003cli\u003eBrass construction resists corrosion and conducts heat away from fluid passages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat fittings and mounting options does the valve support?\u003c\/h3\u003e\n\n\u003cp\u003eThe PV4 includes common SAE-style ports to match many factory and aftermarket brake plumbing layouts. It is designed for flexible installation: left-side, right-side or bottom-facing mounts accommodate engine bay or frame constraints.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRear brake port: 9\/16\"-18\u003c\/li\u003e\n  \u003cli\u003eFront brake ports: dual 3\/8\"-24\u003c\/li\u003e\n  \u003cli\u003eMaster cylinder ports: 1\/2\"-20 and 7\/16\"-24\u003c\/li\u003e\n  \u003cli\u003eMultiple mounting orientations for ease of fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat vehicles will the POWERWORKS PV4 work with?\u003c\/h3\u003e\n\n\u003cp\u003eDesigned as a universal solution, the PV4 fits a wide range of vehicles that use disc brakes on both axles. It’s especially useful on restored classics and custom builds where the original braking balance was tuned for drum rears or different fluid volumes.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eClassic trucks and muscle cars with upgraded disc brakes\u003c\/li\u003e\n  \u003cli\u003eCustom builds that require a proportional valve without changing master cylinder\u003c\/li\u003e\n  \u003cli\u003eMost disc\/disc setups using the listed SAE fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and serviceable is the PV4 assembly?\u003c\/h3\u003e\n\n\u003cp\u003eThe body is machined from brass to provide long-term resistance to rust and to maintain dimensional stability under heat. Installation and replacement are straightforward; the valve mounts near existing brake lines and uses standard thread fittings so lines and adapters can be swapped without special tools.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSolid brass body for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eStandard thread sizes for easy plumbing integration\u003c\/li\u003e\n  \u003cli\u003eSupplied as a single-piece unit ready for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The POWERWORKS PV4 is for mechanics, restoration enthusiasts and DIY builders who need a reliable, compact proportioning solution for disc\/disc brake systems. If you’re tackling rear lock-up, upgrading brakes on a classic vehicle, or fitting a new master cylinder arrangement, this valve gives proportional control without complex hydraulic modifications. Contact POWERWORKS customer support if you need fitment guidance—parts are backed by the brand for quality and service.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the PV4 fit my master cylinder fittings?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It accepts 1\/2\"-20 and 7\/16\"-24 master cylinder threads and common front\/rear line sizes; verify your fittings match these sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the PV4 prevent rear-wheel lock-up?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It reduces rear-line pressure to lower lock-up risk, improving stability without changing front brake performance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"POWERWORKS","offers":[{"title":"Default Title","offer_id":67587470262457,"sku":"B096TTYR4N","price":104.68,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/powerworks-pv4-front-view.jpg?v=1790509224","url":"https:\/\/redleafauto.ca\/products\/powerworks-pv4-proportioning-combination-valve-for-disc-disc-brakes-brass-5-port-adjustable-mounting","provider":"Redleaf Auto","version":"1.0","type":"link"}