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 cooling performance for your Subaru WRX/STI with the CSF all-aluminum high-performance radiator. Built from five decades of radiator expertise, this 2-row core unit is engineered for street driving, high-horsepower builds, and demanding track use. Key Features B-Tube Technology: Patented "B" shaped tubes increase heat transfer surface area by ~15% vs. conventional oval tubes, delivering superior cooling in the same footprint. 2-Row Core: Optimized core density balances cooling capacity and fitment for WRX/STI applications. All-Aluminum Construction: Lightweight, corrosion-resistant material for improved thermal efficiency and durability. Multi-Louvered Fins: Precisely aligned fins maximize airflow and heat rejection—validated in CSF wind-tunnel testing. Stronger, Thinner Tubes: Seam-brazed B-tubes allow thinner material use while increasing strength versus welded O-tubes. Benefits Lower operating temperatures for force-induced and sustained high-load driving Improved engine longevity and consistent performance under track conditions Direct-fit design for WRX/STI—performance upgrade without extensive modification Choose CSF for proven cooling innovation and reliable track-ready performance. This radiator is ideal for enthusiasts seeking measurable temperature control and efficient heat rejection without compromising fitment.