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 or stealth black 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.