Intercooler&Kit. Radiator Intercooler Hose Pipe. 1 x Water to Air Intercooler. Water Inlet & Outlet: NPT 1/2". Air Inlet & Outlet: 2.5". Air Inlet & Outlet: 63mm/63mm. 100% TIG WELDED 6061 Casted Aluminum End Tanks Allowing it to Withstand High Internal Pressure.