Radiator Dbl Pass 29x18 w/Fill Neck GM

The Radiator Dbl Pass 29x18 w/Fill Neck GM by FLUIDYNE PERFORMANCE is a high-capacity cooling solution engineered for serious GM engine builders and performance enthusiasts who demand reliable thermal management in street rods, custom trucks, and competition vehicles. This double-pass radiator design addresses the critical cooling demands of modified and high-output engines where factory cooling systems fall short, making it an essential upgrade for any build pursuing consistent power delivery and engine longevity.

Double-pass radiator construction forces coolant through the core twice—first downward, then upward—significantly increasing dwell time and heat transfer efficiency compared to single-pass designs. The integrated fill neck eliminates the need for external recovery tanks in many applications, streamlining installation and reducing underhood clutter. At 17 lbs with dimensions of 24.25 x 10.75 x 36.5 inches, this radiator balances substantial cooling capacity with manageable package size, accommodating both classic and modern engine bay configurations while maintaining the structural integrity required for high-RPM and sustained-load scenarios.

GM enthusiasts—from restomod builders to LS-engine swappers—benefit most from this purpose-built thermal solution, particularly when upgrading to larger displacement engines, forced induction, or extended highway cruising. Installation compatibility spans most GM platforms when paired with appropriate hose routing and intake manifold configurations; verify your specific year and engine combination against radiator inlet/outlet port locations before ordering. FLUIDYNE PERFORMANCE's reputation in performance cooling makes this double-pass radiator a trusted choice for builders prioritizing reliability alongside power in demanding automotive applications.