WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.The factory 27mm single-row heat exchanger in the B58 and B48 powered BMWs often struggles to manage thermal loads once you add tuning software or an upgraded turbo. The CSF 8131B replaces the thin OEM unit with a massive 68mm 2-row core, the largest of its kind, to keep charge air temperatures stable and prevent the engine from entering limp mode during aggressive driving. CSF utilizes a triple-pass flow design, forcing coolant through the core three times to ensure the lowest possible outlet water temperature before it returns to the manifold charge cooler.
Key Features
- 68mm 2-row core featuring CSF exclusive B-Tube technology
- Triple-pass flow design for maximum cooling efficiency
- 6.5mm multi-louvered fin height for optimized surface area
- Included detachable rock guard for core protection
- CNC-machined mounting pins, brackets, and quick-connect fittings
- Direct plug-and-play design with no modifications required
- Semi-gloss black finish for an OEM plus appearance
- Replaces OEM part number 17118741830
Specifications
| Core Material | Aluminum |
| Core Configuration | 2-Row, 68mm thick |
| Flow Design | Triple-Pass |
| Finish | Semi-Gloss Black |
| Grade | Performance |
| Installation | Drop-In Fit |
Fits
Fits BMW F-series vehicles equipped with the B58 and B48 engines, including the F3X 3-Series and 4-Series and F2X 2-Series. Specifically designed for the 1st generation B58B30M0 engine platform.
Installation
This heat exchanger is a direct drop-in fit that installs in the OEM location. It utilizes factory-style CNC-machined quick-connect water fittings and mounting points, requiring no cutting or permanent vehicle modifications. CSF recommends following the manufacturer repair manual for standard installation procedures or consulting a qualified shop if you are not confident in performing the swap.
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