These are the highest quality radiators available for your truck. They are made in the U.S. and feature a guaranteed new core (not re-cored) and a factory new tank. No exchange is required. These radiators are ready to install and are available in two styles. We carry "standard capacity" for normal applications, and our "heavy duty" style for use on V-8 applications and on vehicles used for towing. For 1/2 to 1 ton trucks that originally came with L-6 or V-8, with 28 3/8 X 17 X 2 5/8 Core. Factory 4 row.