The VIAIR 400C Dual Performance Value Pack is our fastest filling, highest CFM air compressor system, This kit is perfect for industrial use, air horns, off-road applications and a great addition to any air suspension kit. The 400C Dual Performance Value Pack includes two 12-volt Chrome VIAIR 400C air compressors, two heavy duty 40-amp relays and an 110 PSI cut-on, 145 PSI cut-off pressure switch. Each Dual Performance Value Pack comes with remote mount filter assemblies and mounting hardware.