BulletProof Engine Oil System Upgrade 2003-2004 - Upgraded Oil Filtration - Heavy-Duty Air/Oil Cooling; Designed for All Climates

Bullet Proof DieselSKU: 90402003

Sale price$2,720.00
This product qualifies for Free shipping excludes AK, HI
Not compatible with E-Series (Van) Know This Before You Buy

Product Features

BulletProof Engine Oil System Upgrade 2003-2004 - Upgraded Oil Filtration - Heavy-Duty Air/Oil Cooling; Designed for All Climates

Manufactured by: Bullet Proof Diesel


  • Upgrade Engine Reliability with Better Oil Filtration and Cooling
  • Real-world Tested And Patented Product; from Baja to Alaska
  • Heavy-duty Cooler Designed For Heavy-duty Applications
  • Bullet Proof Oil Filtration Prevents Issues With the OEM Oil Filter Assembly
  • Not Compatible With Most After-market Bumpers without additional bracket.  See "Before you Buy"
  • Not Compatible With Tilt-cab Applications

Also Know

  • Add and Upgrade to a BulletProof EGR Cooler - Search "EGR Cooler" above.
  • Check Out our Professional Packs to get all the Parts and Updates that Should Be Done During This Upgrade.  Search "Professional Pack" above.

Mitchell1 Manual Installation Manual

Need help with this product? Call 1-888-967-6653 or 480-247-2331


This kit will allow you to upgrade your 6.0L Ford engine oil cooler from the problematic OEM style to our reliable and capable Air to Oil engine oil cooler.  Upgrading your engine oil cooler is one of the MOST IMPORTANT upgrades you can do if reliability and longevity is your goal.

This kit also upgrades the engine oil filtration to a reliable, simple, spin-on style filter that is commercially available from Wix, NAPA, etc.

This is the perfect kit for towing and hot and cold climates.  Remember - It's not where you live, it's where your BulletProof 6.0L will take you!

Not sure about the "All Climate" or "Hot Climate" option?  The All Climate is designed for those that experience cold weather; this package adds a patented engine oil thermostat that prevents the oil from operating at too low of a temperature.

Keep in mind, the Bullet Proof air-to-oil cooler is designed to work in hot summer climates like Phoenix, Arizona. This means that it will work exceedingly well in Alaska in January. Good rule of thumb? If you think you might need the all climate option, then you should buy it.

Before You Purchase

Please double check your A/C Condenser and Power Steering Cooler Configurations.  Some additional products might be necessary to facilitate a perfect installation.

Check your Condenser and Power Steering Cooler Before you Buy


The Bullet Proof Engine Oil Cooler is not designed for tilt-cab applications.

This product is designed to work with a factory/OEM bumper. If you have questions about this kit working with your truck, please email or call us BEFORE you purchase to ensure proper fit and function. A bracket for the aftermarket bumpers may be needed. You can find the optional bracket here.


Problems with the OEM Oil Cooler
OEM vs BulletProof Oil Cooler
Replace Both Coolers at Same Time
Decipher your VIN Code
Data Monitor your Diesel

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Customer Reviews

Based on 107 reviews
Finally! No Delta worries

As others mentioned, this should've been a stock integration with the Navistar engine. Recently, I started seeing my Deltas slowly spread on my 2004.5 6,0 PSD EX, which meant oil cooler replacement time. Yes, it's a pricey upgrade, but it's worth every penny, especially when considering any OEM Oil cooler install that restarts the clock for the next time. Instructions were clear as day, and installation was completed over the weekend. I live in Socal, and debated the All Weather kit since I spend time in the Sierras during the winter. The Customer Service team walked me through the decision process and I'm glad I went with the Cold option. OAT ranged from -5F to 30F, and Temps were 175OT and 188CT - literally no matter what throttle or boost I was running at 8000ft elevation going up steep grades. I messed up and didn't convey my 05+ front-end conversion, so I had a minor issue with the oil filter bracket shield not fitting since it was the wrong one. The team at BPD immediately shipped the correct part. Stellar service and highly recommend any purchase from BPD

Awesome product

First of all I never write reviews but for this product and customer service I’m doing it!
This product saved my truck and this is how International should have done it from the beginning. The customer service was awesome as well I had a lot of questions before such an expensive purchase and dude was more then patient.
Thank you Bulletproof Diesel!!!

Very easy to install

You guys made best instructions book I never seen, made it very understand easy to install. Can’t wait to but other products from ya. Thank you

Bob B
What an Improvement!!!

Finally got the Heavy duty Air/Oil cooling mod on my 2003 6.0L. What an Absolute Improvement!! And I Highly recommend!! just for a quick ref, stock cooling real world example: 96F OAT, Coolant 210F, Oil 218F, HWY 82 mph, Unloaded. After Mod.: 95F OAT, Coolant 200F, Oil 188F, HWY 82 MPH, Unloaded. oh, this is around 5280ft elevation. Overall Fuel usage improved by approx 2 mpg unloaded. Will test loaded next summer

Guadalupe Garcia
Best air cooled oil cooler upgrade

Thanks to Jacobs help after my installation truck had some issues. After talking with Jacob we were able to address them now truck running like a champ. Oil temp where it should be also highly recommend.