The CSF Racing 3937 is an OE-style direct-fit replacement radiator for the 2019-2022 Ram 2500 and 3500 with the 6.7L Cummins turbo diesel, including the High Output engine. It uses an aluminum core with OE-style tanks and installs in the factory location with no modifications, as a direct replacement for the original radiator.
- Type: OE-style replacement radiator
- Construction: aluminum core, OE-style tanks
- Engine: 6.7L Cummins turbo diesel (incl. High Output)
- Models: Ram 2500, Ram 3500
- Fitment: direct, factory location
- Part number: 3937
Vehicle Applications
Direct fit on the following (6.7L Cummins turbo diesel):
- 2019 Ram 2500
- 2020 Ram 2500
- 2021 Ram 2500
- 2022 Ram 2500
- 2019 Ram 3500
- 2020 Ram 3500
- 2021 Ram 3500
- 2022 Ram 3500
FAQ
What vehicles does the CSF 3937 fit?
The 2019-2022 Ram 2500 and 3500 with the 6.7L Cummins turbo diesel, including the High Output engine.
Is this a performance or OE replacement radiator?
It is an OE-style direct-fit replacement with an aluminum core and OE-style tanks.
Does it require modifications?
No. It installs in the factory location as a direct replacement.

