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Manufacturer: CSF
Description: CSF BMW B58/B48 Front Mount Triple-Pass Heat Exchanger w/Rock Guard - Black
Product Name: CSF Heat Exchangers
Part #: csf8131B
F-Series High-Performance Heat Exchanger
CSF #8131/8131B – MSRP $649 USD/MAP $599 USD
CSF upgraded the inlet/outlet design and improved the core specifications for better air-flow, water-flow, and improved cooling system performance. These updated features result in further lowering Intake Air Temperatures (IATs) of the air-to-water in-manifold charge cooler air cooler system for maximum performance.


- Ultra-Efficient 42mm 2-Row Core, with CSF’s B-Tube Technology, and 6.5mm Multi-Louvered Fin Height
- Results in Optimized Airflow Through the Heat Exchanger Core and Into Other Cooling System Components for Maximum Performance of the Entire Cooling System (Especially Critical if Installed in an X-Drive Model with Transmission Oil Cooler Placed in Front of Heat Exchanger)
- Triple-Pass Flow Design
- Upgraded Inlet/Outlet Design with New Tapered Entry and Exit Points from End Tanks, Resulting in Optimized Water Flow and Increased Performance (Matches OEM Spec)*
- Included Detachable Rock Guard
- OEM CNC Machined Mounting Location Pins and Brackets
- Direct Plug-and-Play Design, Including CNC Machined “Quick Connect” Inlet/Outlet Water Fittings
- Includes Hardware Mounting Kit* for Applications That Have a Factory Transmission Oil Cooler Mounted in Front of the Heat Exchanger (X-Drive Models)
- No Modifications Needed to Install
- For a More in Depth Look Please Check out the CSF B58 Heat Exchanger Press Release
- OEM #: 17118741830 & 17118625431
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