The wide radiator in later Ram 6.7L trucks leaks at the tank or runs hot when the thin factory row is tired. Replace it with the CSF 3937 only if the core is the wide one. This is a 2-row, 1-5/8 inch radiator, thicker than the factory 1-row 36 mm core.

• Build: The core is 39-3/8 inches wide, 20-5/16 inches tall, and 1-5/8 inches thick, so it will not drop into the narrower 33-3/8 inch opening.
• No transmission cooler: No transmission oil cooler is in this radiator.
• Tank: Glass-filled plastic tank and EPDM seals, leak-tested at 150 percent of operating pressure.
• Hoses: Inlet and outlet are 1-15/16 inch, inlet on the left and outlet on the right.
• Part number: CSF 3937 crosses OEM 68322492AA.
• Fitment: 2019-2026 Ram 3500, 4500, and 5500, and 2025-2026 Ram 2500.
• Does not fit: 2019-2024 Ram 2500. Those trucks are listed on CSF 3944, the 33-3/8 inch core.
• Not in the box: The radiator cap is not included, and the hoses and clamps are not in the box.
• Warranty: CSF lists a 2-year limited warranty for the original owner. The term is on the warranty card in the box.

Order today to secure your replacement. Measure the core width and confirm the cab year before you order. This core is 39-3/8 inches wide.