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

This is the CSF triple-pass front mount heat exchanger, complete with a detachable rock guard. It's designed to significantly lower intake air temperatures for your BMW with a B58 or B48 engine, helping to keep performance consistent, especially when you're pushing the engine hard or running upgraded tuning. This unit fits a range of BMW F-series vehicles, including models like the 340i, 440i, and M240i.

Compared to the stock one-row, 27mm thick heat exchanger, this CSF unit features a much larger 68mm two-row core utilizing CSF's B-Tube technology. The real standout feature is its unique triple-pass flow design. Instead of the water flowing through once, it makes three passes within the core. This extended contact time with the cooling fins ensures the outlet water temperature is as low as possible, which directly translates to cooler air entering your engine. The tank design is made to fit within the factory housing, and it uses CNC machined pins and brackets that line up with the original mounting locations, making installation straightforward. The included rock guard helps protect the core from road debris.

This heat exchanger is finished with a hand-polished mirror finish, giving it a clean look behind the grille. If you're looking to extract more power from your B58 or B48 engine, especially with upgraded turbos or performance tuning software, keeping your charge air cool is critical to avoiding limp mode and maintaining consistent power delivery. This unit is a direct plug-and-play replacement, meaning no modifications are needed to install it.