CSF Radiator for Audi B5 A4 1.8T High-Performance All-Aluminum 2-Row Core

CSF Radiator for Audi B5 A4 1.8T — High-Performance All-Aluminum 2-Row Core CSF brings over five decades of cooling expertise to the Audi B5 A4 1.8T. This high-performance, all-aluminum radiator is engineered for street use and track conditions—ideal for high-horsepower builds and motorsport applications that demand superior heat rejection. All-aluminum 2-row core for improved cooling capacity while remaining lightweight. B-Tube Technology: unique B-shaped tubes are brazed at the seam, allowing thinner, stronger tubing and increasing heat transfer surface area by ~15% versus conventional O-tubes. Dual liquid laminar flow: the B-tube design effectively provides the efficiency of two smaller tubes in the same space, improving coolant flow and thermal performance. Multi-louvered fins: precision-aligned fins maximize airflow and are optimized per application for peak heat rejection; wind-tunnel tested for real-world performance. Track-ready durability: engineered to withstand higher operating temperatures and repeated thermal cycles common in performance driving. Upgrade your B5 A4 1.8T with a direct-fit CSF radiator to lower operating temperatures, reduce overheating risk, and maintain consistent performance under demanding conditions.