Heat Exchanger Water to Air Intercooler and Water Pump Heat Exchanger: Overall size:23.5x6.75x2.75(end-tank) inch Heat Exchanger: Inlet and outlet sizes:3/4 (0.75) inch Liquid Water to Air Intercooler: Overall Size:12"x12.5"x4.5" Liquid Water to Air Intercooler: 3" Inlet & Outlet0.75" Water feeding Water Pump: 12VDC3/4" Water inlet outlet