ETL Performance Aluminum Heat Exchanger Upgrade for BMW M340i G20 / Z4 G29 / M440i G22 G42

Constructed entirely from high-grade aluminum, the core is both lighter than the factory unit and more thermally efficient. The increased internal volume means the cooler retains less residual heat between pulls, so you get more consistent intake air temperatures whether you're on lap three of a track day or back-to-back highway runs. Cooler, denser intake charges improve combustion efficiency, which translates to more reliable horsepower output and reduced long-term strain on engine components — a genuine performance and longevity benefit rather than a cosmetic one.

Fitment is exact. Every mounting point is machined to match OEM specifications on the M340i G20, Z4 G29, M440i G22, and G42, so there is no cutting, drilling, or bracket fabrication involved. The unit ships with all required hardware, and installation can be completed with basic hand tools in a home garage. ETL offers the exchanger in both silver and black finishes, giving you a factory-tidy or blacked-out look depending on your preference. For any B58 owner tuning for power or simply protecting their engine against heat-related wear, this heat exchanger is one of the highest-value upgrades available for the platform.