4' In-line Oil Cooler Aluminum

The 4' In-line Oil Cooler Aluminum from ALLSTAR PERFORMANCE is a purpose-built heat management solution designed for high-performance engines that generate excessive oil temperatures during sustained driving, racing, or heavily modified applications. Whether you're running a turbocharged engine, a naturally aspirated stroker, or a vehicle with aggressive tuning, oil temperature control is critical to protecting bearing clearances, maintaining film strength, and extending engine longevity. This aluminum inline cooler mounts directly into your oil circulation circuit, intercepting hot oil before it returns to the pan and dissipating thermal energy before it causes viscosity breakdown or bearing wear.

Constructed from lightweight aluminum, the 4' cooler features a 1.75-inch-wide core design optimized for efficient heat transfer while maintaining compact dimensions of 2.15 x 2.15 inches in cross-section—allowing installation in tight engine bays without requiring major fabrication. The cooler accepts 3/4-inch NPT female inlet and outlet connections, enabling straightforward plumbing integration with -10 AN or NPT-threaded hose fittings. At 4.65 pounds, the aluminum construction keeps parasitic weight to a minimum compared to copper-core alternatives, critical for performance-oriented builds where every pound matters. The natural aluminum finish resists corrosion in typical underhood environments while the extended 49-inch length maximizes cooling surface area and fin density for superior thermal rejection.

This cooler is ideal for street and circuit applications where engine oil consistently exceeds 210–220 degrees Fahrenheit, including turbocharged dailies, drag racing platforms, and high-horsepower road course vehicles. Mechanics and tuners commonly specify inline oil coolers when upgrading fuel mapping, boost levels, or extending oil change intervals under load. Installation requires a thermostat sandwich plate or remote block adapter at the engine and a return line to the pan; proper line sizing and routing ensure optimal flow rates. The 3/4-inch NPT ports accommodate standard automotive hose sizing, making sourcing custom or pre-made line kits straightforward. Compatible with conventional and synthetic oils, the aluminum cooler operates reliably across a wide temperature envelope, making it an essential component for any serious engine modification.