For BMW Z3 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 18.50 x 2.88 Inch. Core Size: 21.50 x 17.25 x 2.50 Inch Inlet/Outlet Diameter: 1.50"/ 1.50"