CSF BMW B58/B48 Front Mount Triple-Pass Heat Exchanger w/Rock Guard

The original OEM B58 heat exchanger is a 1-row unit that is 27mm thick. In comparison, CSF has used its industry-exclusive world's largest 2-row core (68mm) with CSF's B-Tube technology. A unique tank design allows the larger CSF core to still fit into the OEM cooling system housing. Another critical feature of the CSF BMW B58 high-performance heat exchanger is its unique triple-pass flow design. The water traveling through the upgraded heat exchanger flows through the radiator three times before exiting the cooler and flowing back into the manifold charge cooler. This ensures that the outlet water temperature of the heat exchanger is the absolute lowest it can be. The OEM design, as well as more expensive aftermarket designs, all have single-pass flow structures.This Part Fits: Year Make Model Submodel 2017-2021 BMW 230i Base 2017-2021 BMW 230i xDrive Base 2014-2018 BMW 320i Base 2016,2018 BMW 330e Base 2017 BMW 330e iPerformance 2017-2018 BMW 330i Base 2017-2018 BMW 330i GT xDrive Base 2017-2019 BMW 330i xDrive Base 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 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 2017-2021 BMW M240i Base 2017-2021 BMW M240i xDrive Base