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Introducing the Big Boss Performance Dual Oil Cooler for Cummins X15 and ISX Engines, the ultimate solution for keeping your engine's oil cool and preventing the oil from breaking down prematurely.

Most drivers have noticed with newer engines that peak oil temperatures can reach 255 degrees and higher. We have addressed this issue with our new Dual Oil Cooler, which can keep your operating temps closer to the thermostat temperature.

Designed with a robust construction, the Performance Oil Cooler is built to withstand the toughest conditions and keep your engine running cool. With its innovative design, this oil cooler is guaranteed to deliver top performance, reliability, and durability.

Key Benefits:

  • Dual high efficiency cooler packs
  • 75% more oil cooling capacity
  • Lowers peak oil temperature 20-30 degrees
  • Thermostat and bypass valve included
  • Complete new casting and assembly
  • Made in the USA
Any mention of OEM names or OEM product ID numbers/descriptions/model numbers is intended for identification purposes only and does not indicate that it is an OEM part.

    Free standard ground shipping on orders of $250 or more; smaller orders ship at a flat rate. Expedited options are available at checkout.

    1year warranty applies!

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    Buy Now, Pay Later

    Interest-Free Up To 12M

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    Above The Line

    Customer Service Guaranteed

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    Fast Shipping

    On All Orders!

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    Premium Quality Parts

    Manufacturing Since 1973

    offer

    Buy Now, Pay Later

    Interest-Free Up To 12M

    offer

    Above The Line

    Customer Service Guaranteed

    offer

    Fast Shipping

    On All Orders!

    offer

    Premium Quality Parts

    Manufacturing Since 1973