CSF Aluminum Radiator for BMW E9X M3 High-Performance Triple-Pass Flow

CSF Aluminum Radiator for BMW E9X M3 — High-Performance Triple-Pass Flow Keep your E9X M3 cool on the street and at the track. CSF brings over five decades of radiator engineering to this all-aluminum, high-performance radiator designed specifically for BMW E9X M3 applications. Built for high-horsepower builds and motorsport use, it delivers reliable, race-ready cooling when you need it most. Triple-Pass Flow Structure: Coolant travels across the core three times before exiting, delivering lower outlet temperatures and improved thermal stability under sustained load. 2-Row Core with B-Tube Technology: Unique "B"-shaped tubes increase heat transfer area ~15% versus conventional tubes, enabling thinner, lighter aluminum construction with superior strength and efficiency. Dual Liquid Laminar Flow: The B-tube design creates dual flow paths inside each tube for enhanced heat exchange in the same footprint. Multi-Louvered Fins: Precisely aligned, application-specific fins maximize airflow and heat rejection—validated in CSF’s wind-tunnel testing. Engineered for durability and peak performance, this CSF radiator is an ideal upgrade for enthusiasts seeking lower operating temperatures, improved consistency on track, and a direct-fit solution for the BMW E9X M3. Upgrade to proven cooling technology and protect your engine during high-load driving.