Whiteline Rear Brake Proportioning Valve Extension Bolt KitThe Whiteline brake proportioning valve allows a lifted vehicle the rear brake bias to be adjusted back to the correct vehicle braking bias. Features: Designed with the installer in mind by reducing the need of specialised skills, tools and equipment. Protective E Coat coating acts as a hard skin that is much tougher than conventional paint allowing this product to withstand the toughest conditions and resist corrosion for years to come. This kit is