FITMENT: For 1955 Jeep Willys 2.2L 3.7L For 1959-1971 Jeep CJ3 CJ5 CJ6 2.2L 3.7L 4.2L 5.0L Radiator Details Material: Full Aluminum Rows: 3 Rows Core Size:16.54" x 16.85" Aircraft grade aluminum and with raw aluminum finish DESCRIPTION: This Aluminum Radiator is designed to provide maximum cooling efficiency to prevent premature engine failure. Its 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. This Aluminum Radiator is at least 30%-45% more efficient than stock ones. 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.