CSF Aluminum Radiator for WRX/STI 2-Row Core with B-Tube Technology

CSF Aluminum Radiator for WRX/STI — 2-Row Core with B-Tube Technology Upgrade your cooling with CSF’s high-performance all-aluminum radiator engineered specifically for Subaru WRX/STI. Built from over 50 years of radiator expertise, this 2-row core unit delivers reliable street and track cooling for high-horsepower builds and motorsport applications. Key Features B-Tube Technology: Unique B-shaped tubes increase heat-transfer surface area by ~15% vs. conventional O-tubes, enabling dual liquid laminar flow and superior efficiency. Lightweight, strong construction: Seam-brazed B-tubes allow thinner, lighter aluminum while maintaining greater strength than welded O-tubes. 2-Row Core: Optimized balance of capacity and airflow for improved cooling without excessive weight or fitment changes. Multi-louvered fins: Precisely aligned fins maximize airflow and heat rejection; fin geometry is application-specific and wind-tunnel tested. Track-ready reliability: Designed to withstand high thermal loads from racing and aggressive street use. Benefits Expect lower operating temperatures, increased thermal stability under sustained load, and improved engine longevity. The CSF aluminum radiator is a direct-fit performance upgrade that keeps your WRX/STI running cooler during spirited driving, towing, or competition. Choose CSF for proven cooling innovation—engineered performance, precision manufacturing, and race-proven results.