CSF Radiator for MK4 VW 2-Row Aluminum Core with B-Tube Technology

CSF Radiator for MK4 VW — 2-Row Aluminum Core with B-Tube Technology Upgrade cooling for your MK4 Volkswagen with CSF's high-performance all-aluminum radiator. Built on over five decades of radiator engineering, this 2-row core unit delivers superior heat rejection for street, high-horsepower and track-driven applications. B-Tube Technology: CSF's patented "B" shaped tubes increase internal surface area ~15% vs. conventional "O" tubes, enabling dual liquid laminar flow and improved heat transfer without added weight. Lightweight, durable construction: Seam-brazed B-tubes allow thinner, lighter aluminum while offering greater strength than welded oval tubes. Precision multi-louvered fins: Application-specific fin geometry maximizes airflow and cooling efficiency—validated in CSF wind-tunnel testing. 2-row core design: Optimized balance of cooling capacity and fitment for MK4 VW engine bays. Whether you're building a performance street car or a dedicated race vehicle, this CSF radiator improves temperature control, reduces heat soak and supports higher power outputs. Direct-fit engineering and proven materials make it the reliable choice for MK4 VW owners who demand consistent cooling performance.