DeWitts - C7 Corvette Direct Fit®Complete aluminum radiator assembly with no plastic end tanks or rubber gaskets A two row core built with 1 inch wide dimpled tubes which create turbulence and increase heat transfer to the serpentine cooling fins Optional HP Series models feature dual 1. 25 inch wide core tubes for track use Press formed end tanks fully welded to core with no gaskets or epoxy construction 1. 38 inch factory sized cooling hose inlet and outlet connections to use stock