Feature: 100% New and High Quality 1 Year Warranty Type: Brake Proportioning Valve Placement on Vehicle: Right Stable characteristics, high reliability. Aftermarket Products with Premium Quality Installation Manual Is NOT Included Profession install is highly recommend Function: The proportional valve helps to balance the pressure transmitted to the front and rear brakes,thus preventing the rear from jamming Easy to install: During the installation process, the air in the valve body and piping must first be purged.Just look at the valve on the front car, if it has 4 ports, the proportional valve will work Part Number: .