PDI | Big Boss Performance Dual Oil Cooler For Cummins X15 | ISX
$8,994.00
Zip and humm are available over the phone: (07) 5619 7869
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…
Fast AU-Wide Shipping
Returns within 30 days
12 month warranty
Will it fit your vehicle?
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| — | — | — | — | ISX |
A dash means the listing does not narrow it down that far (for example no build dates are listed). Check with us if your vehicle was built near a model change.
Fitment listings are a guide. Not sure? Send us your rego or VIN and our team will check the part for your vehicle, before or after you order.
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
- Ships direct from our supplier in NSW with tracking.
- Road freight is calculated at checkout for your address.
- Delivery usually takes 2–10 business days after dispatch, depending on your location.
- Need your tracking number? Once your order has shipped, email sales@willysworkshop.com.au with your order number and we’ll send you the carrier and tracking details.
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.
Additional information
| Weight | 30 kg |
|---|---|
| Dimensions | 70 × 45 × 35 cm |
Warranty: 12 months from Willys Workshop
Sold and warranted by Willys Workshop. Parts carry our 12-month warranty against defects, from the date of purchase or installation (whichever is later), subject to any manufacturer terms and fair wear and tear (Terms & Conditions, clause 7.1(b)). This is in addition to your rights under the Australian Consumer Law, which cannot be excluded.
- 30-day change-of-mind returns on eligible items: unused, uninstalled and in the original packaging, with a Return Authorisation from us first. A 15% restocking fee applies and return postage is at your cost.
- Wrong fit: if a part covered by our Fitment Guarantee doesn’t fit, we pay the return freight both ways and there’s no restocking fee.
- Special-order or imported-to-order items, electrical parts, ECUs and tuners once registered, connected or flashed, parts that have been fitted or modified, and clearance items can’t be returned for change of mind. Your rights for faulty goods still apply.
- Refunds are made to your original payment method within 14 business days of us receiving and inspecting the return.
Full details: Returns & Refund Policy and Terms & Conditions.
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.






