Air Suspension Compressor Pump Compatible for Land Rover Discovery 3 Hitachi Type LR023964[description]Description A device Compatible for pumping air into or out of an enclosed space is called an air pump, is an emissions component that is part of the secondary air injection system. It is responsible Compatible for pumping clean air into the vehicle's exhaust stream to promote a cleaner and more complete burn before the fumes exit the tailpipe. A pump adds energy to a fluid, resulting in an increase in pressure across the pump, provides