Oil is the lifeblood of your engine, and for a hardworking diesel like the Dodge Ram Cummins, keeping that oil cool is essential to the engine's health. After many years of service, those oil coolers have seen better days. A clogged or leaking oil cooler can reduce the oil's ability to transfer heat through the cooler, causing oil thinning from too much heat and a loss of protection for critical engine components. That's why Mishimoto is proud to offer a stock replacement oil cooler for your engine. This replacement cooler, complete with new seals, will restore and improve your engine oil cooling and protect your engine from unnecessary wear. Plus, it's backed by Mishimoto's Lifetime Warranty.