The best Earl's part in this collection is the Earl's UltraPro Oil Cooler in black, a 25-row wide cooler with 10 O-ring boss female ports: an external air-to-oil cooler for builds whose oil temperatures climb under sustained load or track use. If your engine needs more oil cooling than the factory setup provides, this is the piece this shelf is built around.
An external oil cooler works like a small radiator for engine oil: oil circulates through the core, airflow pulls heat out, and cooler oil returns to the engine. Row count and core width set how much heat it can shed and how much space it needs, so placement and airflow matter as much as the core itself. The 10 O-ring boss female ports in the title are the connection points: lines and fittings must match that port style, and hose runs are planned around the cooler rather than included by default, so check the listing for what is in the box and check your year and model.
Plan the rest of the circuit in the Oil System range and the Cooling shelf, and read our guide to cooling solutions for turbocharged cars.
Brands to know
Earl's is represented here by the UltraPro cooler itself: a wide, 25-row core in black with O-ring boss ports. In this catalog Earl's is the performance-plumbing name, and this cooler is the heat-management end of that work: the core you mount when oil temperature is the problem to solve.
Mishimoto is the broad cooling shelf alongside it, covering radiators, intercoolers, fans, and oil cooling parts for many Japanese platforms. Owners cross-shop it when cooling the whole engine bay at once, since one brand can cover coolant and charge-air temperatures in the same order.
CSF is the radiator-focused alternative in this group, known in this catalog for high-capacity cooling cores. A CSF radiator and an Earl's oil cooler solve different halves of the same heat problem, a common pairing on cars that see sustained high load.
Radium Engineering covers the precision fluid-plumbing side, with fuel and oil components sharing the same fittings-and-lines planning as a cooler install. Builders visit its shelf for adapters and hardware, much of it cross-shopping the Fuel Systems range.
FAQ
Is this oil cooler a direct bolt-on for my car?
It is a universal-style core with 10 O-ring boss female ports, not a vehicle-specific kit. Brackets, lines, and fittings are planned per car, so check your year and model and mounting space before ordering.
What else do I need to install it?
Typically matching ORB fittings and oil lines, a way to tap the oil circuit such as a sandwich adapter, and secure mounting with clear airflow. Check the listing for exactly what is included.
Do I need a thermostat with an external oil cooler?
Many street cars run an oil thermostat so the oil still reaches operating temperature in normal driving instead of being over-cooled. Whether your build needs one depends on climate and use.
How do I know if I need an oil cooler at all?
Sustained high oil temperature under load is the signal: repeated track sessions or hot-climate hard driving. If you do not measure oil temperature today, a gauge reading on your hardest normal drive answers the question better than guessing.
