Earl's Performance Engine Oil Cooler Adapters

Earl's Performance Engine Oil Cooler Adapters are the professional builder's choice for integrating an external oil cooling system into a high-performance engine build. Since 1955, Earl's has supplied the motorsport and high-performance aftermarket with aircraft-grade plumbing components — and these oil cooler adapters carry on that same legacy of precision engineering and dependable performance.

These adapters serve as the critical connection between an engine's oil system and an external cooler, enabling controlled oil temperature management that helps protect vital engine internals and extend overall engine life. Whether the application is street performance, track day use, or full competition, Earl's oil cooler adapters are engineered to deliver leak-free, long-term reliability under demanding operating conditions.

Key Features:

• Billet aluminum construction — Precision-machined for superior dimensional accuracy, structural integrity, and lasting durability
• Slim, low-profile design — Engineered to clear headers and other underhood components in tight engine bays
• AN male port connections — Enable clean, professional-grade fluid line routing when paired with Earl's AN hose and fittings
• O-ring sealed — Provides a secure, leak-free installation for dependable long-term operation
• Anodized finish — Offers corrosion resistance and a clean, finished appearance
• Multiple adapter styles available — Side-mount, sandwich, bypass, and bolt-on configurations to suit a wide variety of engine platforms and plumbing layouts
• Thermostat-compatible options — Select variants support thermostat integration for temperature-regulated oil flow control

Earl's Performance is part of the Holley family of brands and remains one of the most trusted names in automotive fluid system plumbing worldwide. These oil cooler adapters are designed to pair seamlessly with Earl's UltraPro and Temp-A-Cure oil coolers along with Earl's AN hose and fittings for a complete, professional-grade cooling system installation. Select the configuration that fits your engine platform and plumbing layout from the available variants below.