Description
PDI | Big Boss Performance Dual Oil Cooler For Cummins X15 | ISX
Please contact us for product pricing.
Available for: 1999-2024 Cummins X15 and ISX Engines
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
Warranty: 1 Year Unlimited Mileage Warranty
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.
| OEM Reference Part Number |
4386026, 4386025, 4386199, 4955831, 4965896, 4089583, 4965906, 4965895, 4955830, 3682787, 3682788, 4920199, 5394142, 4952498 |
Shipped Australia-Wide
- Dispatched from within Australia with tracking.
- Same-day dispatch on in-stock orders placed before 11am AEST, Monday–Friday.
- Shipping is calculated at checkout based on size, weight and your delivery address.
- Estimated delivery 2–7 business days depending on your location.
Freight question? Call us on (07) 5619 7869.
PDI | Big Boss Performance Dual Oil Cooler For Cummins X15 | ISX Please contact us for product pricing.
Double Duty Diesel — Manufacturer Pass-Through Warranty
Double Duty Diesel parts carry the original manufacturer's warranty:
- Fluidampr — Lifetime warranty on harmonic balancers
- MAHLE / Clevite — 12 months on bearings, gaskets, sealing components
- Dynomite Diesel — 12 months on stock-spec injectors and pumps; performance/race spec varies
- Power Driven Diesel — 12 months on turbos and bundled tuning kits
- Returns must be notified within 30 days of delivery
- Parts only — installation not covered
Workshop fitment available at Willys for transmissions, injectors and engine internals.
Read the full Double Duty Diesel warranty terms →
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.
