ECMRAD Aluminum Radiator is produced and designed to provide maximum cooling efficiency to prevent engine cooling failure. It is made of full aluminum light-weight, and high-heat transferring aluminum features a tube and fin design that, dramatically increases surface area that enables the heat to dissipate more efficiently. It has an increased durability over the factory plastic end tank radiator, and much inmprovwed engine cooling. Most importantly, it has a much higher capacity for coolant than stock ones, which means that your cooling system will be more efficient and will be more resistant to temperature surges in racing applications.This Aluminum Radiator Compatible for: for Chevy Chevelle 1964-1967 (283ci V8, 396ci V8) for Chevy Caprice 1966 (283ci V8, 327ci V8) for Chevy Caprice 1967-1968 (4.1L I6, 283ci V8, 327ci V8) for Chevy Impala 1963-1965 (3.8L I6, 283ci V8, 327ci V8) for Chevy Impala 1966-1968 (4.1L I6, 283ci V8, 327ci V8) for Chevy Biscayne 1963-1965 (3.8L I6, 283ci V8, 327ci V8) for Chevy Biscayne 1966-1968 (4.1L I6, 283ci V8, 327ci V8) for Chevy Bel Air 1963-1965 (3.8L I6, 283ci V8, 327ci V8) for Chevy Bel Air 1966 (4.1L I6, 283ci V8, 327ci V8) for Chevy Bel Air 1967-1968 (4.1L I6, 283ci 283ci V8, 327ci V8) for Chevy El Camino 1964-1967 (all engines) Radiator Size Details: Core Size: 22.25''H X 27.75''W X 2.5''T Overall Size: 16''H X 25.25''W Inlet/Outlet Diameter: 1.5''/ 1.75'' Transmission Oilcooler: include,built-in,1/2" 20 Straight Thread G1/4 Surface finish: Aircraft 5057 grade aluminum tank & core Petcock Drain: OEM style brass petcock drain Radiator Cap: CNC machined filler neck and capPackage Included: 1 X 4-Row Aluminum Radiator w/ Radiator Cap 1 X Aluminum Shroud 2 X 12" Fans (Includes mounting kits) 1 X Thermostat Relay Kit in a Carton Box