This listing is for a brand new BRASS Proportioning Valve and (2) 2 pound residual valves. This combination proportioning valve is for Disc/Disc applications. This valve performs all the necessary functions when using disc brakes in the front and disc brakes in the rear.
This valve will reduce braking pressure to the rear when necessary to prevent the brakes from locking up. It also distributes the brake pressure evenly so that each brake is working evenly. Finally, this valve offers the brake warning light switch to alert you if there is any failure in the braking system.
This valve is a great upgrade over the original and is a must when upgrading to 4-way disc brakes. This is a GM style valve, but will work on almost any Ford, Mopar, Chevy, or whatever, as long as you have the right fittings. This valve is solid brass, making it long lasting and heavy duty.
The blue valves are used with any disc brake application where the master cylinder is located under the floor. When the master cylinder is under the floor, it is usually lower than the calipers. Gravity and vibration can cause brake fluid to leak back to the master cylinder away from the calipers, causing a loss of brake pressure. These valves will act as a one way check valve that prevents this type of bleed-back. Without it, there is a good chance that the brakes will drag or give out completely! These valves are an inexpensive and necessary addition to your brake system.
PV4 + (2) blue valves