Alum DBL Pass 1.25in 19in x 27.5 GM Alum

The Alum DBL Pass 1.25in 19in x 27.5 GM Alum is a dual-pass aluminum radiator engineered for General Motors applications requiring efficient thermal management in street, strip, and performance environments. This core is built for enthusiasts and mechanics who demand reliable cooling under sustained load, whether running stock or modified engines. The dual-pass design ensures progressive coolant circulation, reducing hot spots and maintaining consistent operating temperatures even during aggressive driving or towing scenarios.

Constructed from lightweight aluminum with a 1.25-inch inlet/outlet neck configuration, this Griffin radiator maximizes heat rejection while minimizing weight penalty—a critical consideration for suspension geometry and fuel economy on modified vehicles. The 19-inch core width and 27.5-inch height fit standard GM engine bays without requiring custom fabrication, and the dual-pass internal baffle system directs coolant flow to optimize contact with cooling fins for superior heat transfer rates. Aluminum construction resists corrosion better than traditional copper-brass units, extending service life and reducing maintenance intervals in high-performance applications.

This radiator fits most full-size and mid-size GM trucks, SUVs, and passenger vehicles from the 1960s through modern platforms, making it ideal for restorations, engine swaps, and performance builds where OEM cooling capacity falls short. Installation requires standard hose clamps and mounting brackets compatible with existing GM radiator support structures; most bolt-in applications take under two hours. Mechanics and hot rodders favor Griffin radiators for their proven track record of durability, consistent performance across temperature ranges, and availability of matched upper and lower hose assemblies for plug-and-play integration.