This CSF auxiliary radiator upgrades the side-mounted coolers on the BMW F87 M2 and Gen 1 B58 cars (340i, 430i, 440i, M240i). Its 2-row 42mm core uses CSF's exclusive B-Tube technology with new 5mm ultra-efficient multi-louvered fins for increased tank volume and cooling capacity over the OE unit. The 100% TIG-welded all-aluminum build replaces the fragile OE plastic pod mounting with a stronger integrated frame, adds a detachable rock guard to protect against road debris, and drops in with no modifications. Sold individually; most applications use two.
| Type | High-performance auxiliary radiator |
| Material | 100% aluminum, TIG-welded |
| Core | 2-row 42mm, CSF B-Tube technology |
| Fins | 5mm multi-louvered |
| Inlet / Outlet | OEM-style quick-connect |
| Finish | Satin black |
| Fit | Drop-in; fits both left and right side; sold individually (most applications use two) |
| Included | Detachable rock guard |
| Warranty | 2-year limited warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2016-2018 | BMW | 340i | Base |
| 2017-2019 | BMW | 340i GT xDrive | Base |
| 2016-2018 | BMW | 340i xDrive | Base |
| 2017-2020 | BMW | 430i | Base |
| 2017-2020 | BMW | 430i Gran Coupe | Base |
| 2017-2020 | BMW | 430i xDrive | Base |
| 2017-2020 | BMW | 430i xDrive Gran Coupe | Base |
| 2017-2020 | BMW | 440i | Base |
| 2017-2020 | BMW | 440i Gran Coupe | Base |
| 2017-2020 | BMW | 440i xDrive | Base |
| 2017-2020 | BMW | 440i xDrive Gran Coupe | Base |
| 2016-2018 | BMW | M2 | Base |
| 2017-2021 | BMW | M240i | Base |
| 2017-2021 | BMW | M240i xDrive | Base |
