Cold Case Radiators GMT556A21LS - 77-87 GM Truck Auto Trans 21 Inch LS Swap Aluminum Radiator

Cold Case Radiators GMT556A21LS - 77-87 GM Truck Auto Trans 21 Inch LS Swap Aluminum Radiator

1977-1987 Chevy/GMC Truck 21 Inch LS Swap Aluminum Performance Radiator. This is the radiator that is 21 Inch high overall and has the steam port for an LS Swap. External trans cooler recommended. 

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 Rows of 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 77-87 GM Truck LS Swap trucks

Radiator Specs

• Core Height 18.8 Inch
• Core Width 28.35 Inch
• Overall Height 21 Inch
• Overall Width 34.33 Inch
• Overall Thickness 3 Inch
• Tubes (2) 1.25 Inch Tubes
• Upper Hose 1.50 Inch
• Lower Hose 1.50 Inch