The Airdog 901-04-0004-4 Low Fuel Pressure Warning Light is a must-have for any car or truck owner with an AirDog lift pump. This light kit includes everything you need to install it into your lift pump, and is triggered when fuel pressure is below 5 PSI. This warning system is vital to preventing damage to your fuel system or AirDog lift pump, and can save you thousands of dollars in repairs down the road. So don't wait until it's too late, pick up your Airdog Low Fuel Pressure Warning Light today!