GM LS Engine Oil Cooler Adapter

The GM LS Engine Oil Cooler Adapter by EARLS is a precision-engineered solution designed for LS-series engine builders and performance enthusiasts seeking efficient thermal management in modified and high-output applications. This side-mount adapter bridges the gap between your LS block and a remote oil cooler setup, eliminating the need for costly custom fabrication while maintaining OEM-level reliability. Whether you're building a street engine, race motor, or swapping an LS into a classic or custom chassis, this adapter provides a clean, bolt-on integration point for comprehensive cooling system upgrades.

Manufactured from lightweight aluminum and finished in black anodize for corrosion resistance, the GM LS Engine Oil Cooler Adapter features dual 10 AN male ports for inlet and outlet lines, plus dual 1/8 inch NPT female ports for auxiliary gauge or sensor installation. The 10 AN port sizing supports high-flow applications and minimizes pressure drop, critical for maintaining consistent oil temperatures under sustained load or competition use. The anodized finish protects against oxidation and coolant staining while providing a professional appearance in visible engine bays, and the compact 4.3 x 2.4 x 4.75 inch profile allows flexible mounting in tight engine compartments without interfering with headers, intake manifolds, or accessory drive systems.

This adapter is essential for LS engine swaps, turbo and supercharged builds, and high-horsepower naturally aspirated applications where factory oil cooling becomes inadequate. Mechanics and fabricators appreciate the standardized 10 AN connection—compatible with EARLS remote coolers, sandwich adapters, and aftermarket line kits—reducing guesswork during installation. The NPT ports enable real-time oil temperature monitoring via mechanical or electronic gauges, allowing tuners to dial in cooling strategy with precision. Weighing just 0.58 pounds and requiring minimal machining, the GM LS Engine Oil Cooler Adapter integrates seamlessly into street, strip, or road-race powerplants, making it an indispensable component for serious LS engine development.