2011-2016 Chevrolet/GMC Duramax Diesel Truck 6.6L Aluminum Performance Radiator. These COLD-CASE radiators are Tig welded 100 percent aluminum and absolutely beautiful. Don't buy a 3 or 4 row aluminum radiator! It doesn't cool as good as these oversize 2 row models. 100 percent TIG welded All Aluminum Polished tanks 16 fins per inch Corrugated fins that give more surface area and more thermal transfer Pressure tested Direct fitment for all 11-16 Duramax 6.6L Radiator Specs Core Height 27.5 inch Core Width 33.5 inch Overall Height 28.5 inch Overall Width 41 inch bolt holes Overall Thickness 2.75 inch Tubes (2) 1 inch Tubes