1970-1981 Pontiac Firebird Trans Am Aluminum Performance Radiator. MT Cars. 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 Polished OE style tanks (2) 1.25 inch tubes 16 fins per inch Corrugated fins that give more surface area and more thermal transfer Pressure tested For manual transmission Direct fitment for 70-81 Firebird Trans Am Old Part Number: RFE18L Radiator Specs Core Height 18.4 inch Core Width 27.5 inch Overall Height 18.8 inch Overall Width 33.2 inch Overall Thickness 3 inch Tubes (2) 1.25 inch Tubes Upper Hose 1.57 inch Lower Hose 1.57 inch