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

This CSF heat exchanger is designed to significantly lower intake air temperatures for your BMW B58 or B48 engine. You get the heat exchanger itself, which features a satin black finish for an OEM+ look, and a detachable rock guard to help protect the core. This is a triple-pass design, meaning the coolant flows through the core three times, which helps ensure the coolest possible outlet water temperature. This is a critical component for B58 engines, especially when running upgraded turbochargers or performance tuning software, as it helps keep the charge air cool and prevents the vehicle from entering limp mode.

Compared to the stock 1-row, 27mm thick OEM unit, this CSF exchanger uses a much larger 68mm thick, 2-row core with CSF's B-Tube technology. The tank design allows this larger core to fit within the original cooling system housing, and the mounting pins and brackets are CNC machined to match the OEM locations. This means it's a direct plug-and-play installation with no modifications needed, and it includes CNC machined "quick connect" fittings for the inlet and outlet water lines. The multi-louvered fin height on the core also helps with heat dissipation.

This heat exchanger fits a wide range of BMW models, including vehicles like the 340i, 440i, and M240i. It's a well-built upgrade that directly replaces the factory part, making it a solid option for anyone looking to improve their engine's cooling performance.