Viair 40040 400C Air Compressor Kit 12 VOLT - 150 PSI Max Working Pressure, engine must be running during use. 2.54 CFM Free Flow @ 0 PSI This unit is designed to be mounted onto the vehicle for use in an onboard air system or air suspension system. Can also be used to power air horns. All VIAIR Compressors are oil-less, brush DC, permanent magnetic motors. Kit includes 400C compressor, mounting hardware with vibration isolators, freeze-resistant wiring, remote mount air filter assembly, air line for remote mounting air filter, heavy duty terminals and more