CarBahn heat exchangers are engineered with one purpose: keep intake temps stable so your BMW can deliver consistent, repeatable power — no matter how hard you drive it.

Every unit is built using the same design philosophy Steve Dinan applied to championship-winning endurance cars: maximize surface area, optimize coolant flow, and eliminate heat soak during sustained boost. Whether your build lives on the street, the track, or somewhere in between, our cooling upgrades give your S58, S63, S68, B58, and other BMW engines the overhead they need to run harder for longer.

CarBahn’s motorsport-grade bar-and-plate cores offer up to 40% more thermal surface area than OEM units, paired with optimized end-tank geometry that maintains coolant velocity while shedding heat faster. The result is lower intake air temps, more stable timing, and performance that doesn’t fade once the factory system becomes overwhelmed.

From G8X M3/M4 track cars to F9X M5/M8 street builds and high-load M SUVs, each heat exchanger is sized for its chassis and designed to integrate cleanly with OEM mounting points.

If you're pushing Stage 2+, live in a hot climate, run repeated highway pulls, enjoy roll racing, or simply want your BMW to stay at peak power longer, a CarBahn heat exchanger is one of the most impactful upgrades you can make to your build.

Explore the full lineup below and find the heat exchanger engineered specifically for your BMW platform.