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.
