If you’re running a Cummins ISX or X15, you already know these engines can run hot oil temperatures, especially when they’re working hard. The PDI Big Boss Performance Dual Oil Cooler was built to solve that problem and keep your engine protected.
Many drivers see peak oil temperatures climbing to 255°F or higher in newer engines. When oil gets that hot, it starts breaking down faster, reducing lubrication and increasing wear on internal components. The Big Boss Dual Oil Cooler addresses this issue with a high-efficiency dual cooler design that dramatically improves heat dissipation.
With dual high-efficiency cooler packs, this system provides up to 75% more oil cooling capacity compared to the factory setup. The result is 20–30°F lower peak oil temperatures, helping keep your oil closer to the thermostat operating range and maintaining proper lubrication under heavy load.
This cooler is built as a complete new casting and assembly, designed for durability and long-term reliability. It also includes the thermostat and bypass valve, making it a comprehensive solution for improving oil temperature control on your engine.
Whether your truck is hauling heavy loads, running long miles, or pushing performance upgrades, the PDI Big Boss Dual Oil Cooler helps keep your engine running cooler, longer.
Available For:
1999–2024 Cummins ISX & X15 Engines
Key Benefits
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Dual high-efficiency cooler packs
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75% more oil cooling capacity than factory design
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Reduces peak oil temperatures by 20–30°F
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Thermostat and bypass valve included
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Complete new casting and assembly
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Built for durability and heavy-duty use
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Made in the USA
Warranty:
1 Year Unlimited Mileage Warranty
At Redneck Diesel Performance, we believe keeping your engine cool is one of the best ways to protect your investment and keep your truck pulling strong mile after mile.
