Earl's Performance 1138ERL Oil Cooler Adapter for Ford Godzilla 7.3L
Updated June 23, 2026
The Earl's 1138ERL oil cooler adapter is a purpose-built component for the Ford 7.3L Godzilla engine when paired with Holley's accessory drive and oiling system kits. It simplifies the addition of an external oil cooler by providing dual -12 AN male ports sealed with o-rings, allowing secure, high-flow connections for engine oil cooling in performance, towing, or racing applications.
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Design and Function
This adapter mounts directly to the Holley Godzilla oil pan, replacing the factory cooler bypass or blanking plate. It uses dual -12 AN male fittings (dash 12) to accept standard AN hose ends, enabling a clean, leak-resistant connection to an external oil cooler. The o-ring sealing eliminates the need for gaskets or sealant, simplifying installation and reducing leak paths.
Compatibility
Designed exclusively for the Ford 7.3L Godzilla engine (including 415/445 stroker variants), this adapter only fits the Holley Godzilla oil pan found in Holley accessory drive and oiling system kits: 20-320, 20-320BK, 20-340, and 20-340BK. It is not compatible with the factory Ford oil pan or other aftermarket pans.
Installation Notes
Installation requires the Holley Godzilla pan already in place. The adapter bolts on using the existing oil cooler ports; o-rings are pre-installed or supplied. Tighten the -12 AN fittings to standard AN torque specifications (typically 30-35 ft-lb for aluminum fittings, but always follow the manufacturer's guidelines). Use compatible -12 AN hose and fittings for the cooler circuit.
Performance Considerations
Adding an external oil cooler with this adapter helps maintain optimal oil temperatures under sustained high load, improving engine longevity and oil film strength. It is especially beneficial for forced induction, heavy towing, or track use. Ensure the cooler and lines are properly sized to avoid excessive pressure drop.
