1984-1987 Buick Regal Grand National Aluminum Performance Radiator. AT Cars. This radiator has the correct oil and trans fittings used on the 86-87 models, unlike other reproductions on the market. You will need to modify part of the radiator support in order for this radiator to fit. See picture above. 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. These radiators are original appearing and have the correct stamping. Once painted, you'd be hard pressed to find a difference over an original versus a COLD-CASE. 100 percent TIG welded All Aluminum (2) 1.25 inch Tubes Polished OE style tanks 16 fins per inch Corrugated fins that give more surface area and more thermal transfer Pressure tested For automatic trans Direct fitment for 84-87 Turbo Regal GN Old Part Number: RPE57 Radiator Specs Core Height 16.75 inch Core Width 26 inch Overall Height 18.5 inch Overall Width 32 inch Overall Thickness 3 inch Upper Hose 1.25 inch Lower Hose 1.5 inch Tubes (2) 1.25 inch Tubes