64-65 GTO Radiator w/AC AT

The 64-65 GTO Radiator w/AC AT from Cold Case Radiators is purpose-built for first-generation Pontiac GTO owners who demand modern cooling performance without compromising authenticity. Whether you're running factory air conditioning and an automatic transmission or upgrading a weekend cruiser, this radiator replaces the undersized original cooling system that struggles under sustained driving and track conditions. Muscle car enthusiasts know that inadequate cooling leads to vapor lock, detonation, and engine damage—this unit solves that problem while maintaining bolt-on compatibility with your vintage GTO.

Cold Case Radiators engineered this aluminum core design specifically for the AC-equipped automatic transmission variant of the early GTO, accounting for the higher heat load those systems generate compared to non-AC models. The all-aluminum construction—versus the original copper/brass design—provides superior heat transfer and durability while resisting corrosion and electrolysis common in vintage cooling systems. Dimension optimization (16" width × 26" height × 36" depth) ensures it fits the original mounting points without modification, and the 48-pound weight keeps underhood balance while delivering the thermal capacity of a modern performance radiator. Dual inlet/outlet ports are tuned for proper circulation with period-correct hose connections and automatic transmission cooler lines.

Restoration builders and street-driven GTO owners benefit most from this radiator because it eliminates the cooling compromises that plague original equipment while preserving the original underhood appearance. Installation requires no hood modifications, radiator support rework, or custom brackets—simply drain the old radiator, unbolt it, and install the Cold Case unit using existing mounting holes and hose connections. This radiator is ideal for 1964–1965 GTOs with factory air conditioning and automatic transmissions; verify your vehicle's configuration before ordering, as different cooling circuits exist for manual transmission or non-AC variants.