This is a brand new Big End #20000 brake proportioning valve pressure bias adjuster knob style. It is designed to enhance the performance of your vehicle without compromising on safety. This valve is suitable for use in various auto performance parts, including master cylinders, balance bars, and chassis, suspension & brakes. The valve is manufactured with high-quality materials to ensure durability and reliability. Its knob-style design makes it easy to adjust the pressure bias to suit your needs. 

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