DESCRIPTION Proportioning Valve --Finish: Chrome --Adjustable proportioning valves are essentially pressure-reducing valves and are often utilized in disc/drum, disc/disc, and drum/drum braking systems. --The valve is used to control front-to-rear brake pressure bias and will work for all types of vehicles. --Install this valve between the distribution block and the rear flex hose in the front-to-rear rigid brake line. --Always use tube wrenches to tighten fittings properly. --The final settings of this valve will depend on your particular vehicle and individual preference. --3/8"-24 IFF fitting size. --Pressure adjustments range from 100-1000 PSI and provide for a maximum decrease of 57% in line pressure. --"IN" (Stamped on valve) - Rigid brake line from the distribution block to this por.