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

CSF Radiator for WRX/STI — 2-Row Aluminum Core with B-Tube Technology High-performance cooling engineered for WRX/STI . CSF brings over 50 years of radiator experience to a purpose-built, all-aluminum 2-row core designed for street and track use. Ideal for high-horsepower builds and race vehicles that demand dependable heat rejection under extreme conditions. Key Features B-Tube Technology: Unique "B"-shaped tubes brazed over the seam for increased strength and thermal surface area — about 15% more than standard tubes. Dual Liquid Laminar Flow: B-tubes create dual flow paths within the same envelope, improving heat transfer and efficiency versus single large tubes. Lightweight All-Aluminum Construction: Thinner, lighter tube walls without sacrificing durability, delivering better cooling per pound. Multi-Louvered Fins: Precisely aligned, application-specific fin geometry optimized in CSF wind-tunnel testing for maximum airflow and heat rejection. Track-Proven Design: Built to handle sustained high temps and heavy duty cycles for motorsports and aggressive street use. Benefits Expect lower operating temperatures, improved thermal stability, and increased reliability during spirited driving or track sessions. The CSF 2-row B-Tube radiator is a direct performance upgrade that maintains OE fitment while delivering superior cooling capacity.