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: 26.50 x 24.00 x 2.50 Inch. Core Size: 21.75 x 19.00 x 2.25 Inch Inlet/Outlet Diameter: 1.625"/ 1.75"