Oil is the lifeblood of an engine, and in a hardworking diesel engine like the 2003--2007 6.0L Powerstroke, keeping that oil cool is essential to the engine's health and running. The stock 2003--2007 Powerstroke liquid-to-liquid oil cooler uses engine coolant to draw heat away from the oil and vent it through the engine radiator. It's a stout design that typically performs well for daily driven trucks. However, after over 12 years of service, many of those stock coolers have seen better days. A clogged or leaking oil cooler can reduce the oil's ability to transfer heat to the coolant, causing thinning and a loss of protection for critical engine components. That's why Mishimoto is proud to offer a stock replacement 2003--2007 Ford 6.0L Powerstroke oil cooler. This replacement cooler, complete with new seals and o-rings will restore your 6.0L Powerstroke's oil cooling and protect your engine from unnecessary wear. This cooler is a direct fit and provides all the cooling a daily driven 6.0L needs at an affordable price point. For even more protection, check out our 2003--2007 Ford 6.0L Powerstroke Coolant Filter Kit and 6.0L Catch Can Kit. Like all Mishimoto 6.0L Powerstroke products, this stock replacement oil cooler is backed by our Mishimoto Lifetime Warranty for a lifetime of worry-free driving.