For Chevrolet C/K Series Full Aluminum 3 Row Racing Radiator Constructed of High Quality T-6061 Aluminum Construction. High Performance JDM Spec. 3-Row Racing Design Light Weight Direct Bolt-On OEM Fitment or Replacement. Stronger & Higher Capacity for Coolant than Stock Units Highly Increase Cooling Performance Overall Size: 25.25 x 22.50 x 2.75 Inch. Core Size: 23.00 x 17.25 x 2.25 Inch Inlet/Outlet Diameter: 1.75"/ 1.75"