21-Inch Aluminum Performance Radiator

The Cold Case GMT556A21LSK is a 21-inch aluminum performance radiator specifically engineered for 1977-1987 Chevy/GMC trucks undergoing an LS engine swap with an automatic transmission. This radiator boasts a robust 100% TIG-welded aluminum construction, ensuring durability and efficient heat dissipation. Its polished OE-style tanks provide a classic aesthetic, while the dual 1.25-inch tubes and 16 fins per inch with corrugated design maximize surface area for superior thermal transfer. This performance radiator is designed as a direct fit replacement, simplifying installation. It features a dedicated steam port crucial for LS swap applications and comes pressure-tested for reliability. The oversized 2-row design is highlighted as being more effective for cooling than traditional 3 or 4-row aluminum radiators. For optimal performance, this unit includes dual 12-inch fans and a shroud to enhance airflow.