Compatible with 2003–2009 Dodge Ram Cummins 5.9 L or 6.7 L, the Mishimoto MMRAD‑RAM‑03 performance aluminum radiator is a direct factory fit engineered to elevate cooling performance and support your heavy-duty needs. This two-row brazed aluminum core with TIG-welded end tanks is designed to handle increased thermal loads from towing, hauling, and long idling, reducing coolant temperatures by 5–10 °F compared to stock setups under real-world driving. Constructed with thick-walled aluminum tanks, a high-pressure radiator cap, and a magnetic drain plug that traps metal particles to extend engine life, this radiator defends your engine from heat, stress, and corrosion. The authentic serial plate ensures you're getting a genuine engineered part backed by Mishimoto's brand reputation since 2005. Modern heavy-duty truck trends show an increasing demand for reliable overheating prevention as towing and hauling become more intense. Stock radiators are often pushed beyond their limits, leading to heat soak, reduced performance, and costly downtime. The Mishimoto radiator responds to this need with OEM-style fitment and hardcore build quality—no cutting, no guessing, just bolt-on reliability. Enthusiasts consistently praise Mishimoto radiators for their robust aluminum construction and leak-free builds. Whether you're towing a trailer, off-roading, or pushing your truck through demanding tasks, this radiator delivers upgraded cooling, factory-fit ease, and the performance-grade craftsmanship that Mishimoto is known for. Constructed with high-quality materials and backed by Mishimoto's high standards for durability and quality.