F-Series B58/B48 Heat Exchanger, CSF 8131

CSF 8131 is the polished/silver triple-pass charge-cooler heat exchanger for the specified BMW F2X/F3X B48/B58 applications. It is not the black-finish 8131B.

• Two-row 68 mm core
• Detachable rock guard included
• Quick-connect coolant fittings and original-location mounting
• Manufacturer replacement reference: BMW 17118741830

Confirm the chassis, engine, original exchanger number and current CSF application guide before ordering. A B48/B58 engine name alone does not establish fitment for every BMW, particularly later G-series models.