DeWitts GM Truck Direct Fit Aluminum Radiators are designed to install into the stock mounting and use the factory connections without any modifications or adapters. Many companies offer replacement radiators and most of them require some alterations, even when they claim they fit. Each DeWitts Direct Fit radiator starts with a USA made core that is furnace brazed. These cores feature two rows of cooling tubes, serpentine fin and they are epoxy free. Press formed end tanks are manually TIG welded by expert craftsmen, providing the ultimate in strength and appearance. Finding the perfect radiator for your build is simple with optional electric fans and several finish options.