CSF Aluminum Radiator for 4Runner 2-Row Core with B-Tube Technology

CSF Aluminum Radiator for 4Runner — 2-Row Core with B-Tube Technology Brand: CSF — trusted over five decades for high-performance cooling. Upgrade your Toyota 4Runner with a purpose-built, all-aluminum radiator engineered for demanding on- and off-road use. This CSF heavy-duty radiator combines lightweight construction and precision engineering to deliver superior cooling for towing, overlanding, and performance driving. Key Features 2-Row Core — compact footprint with high thermal capacity for modern engine bays. B-Tube Technology — patented "B" shaped tubes increase heat transfer surface area by ~15% vs. traditional round tubes for improved efficiency. Dual Liquid Laminar Flow — B-tubes act like two smaller tubes within the same space to enhance coolant flow and heat rejection. Ultra-Efficient Multi-Louvered Fins — precision-aligned fins optimized in CSF’s wind-tunnel lab for maximum airflow and heat dissipation. Lightweight & Durable — brazed seams allow thinner aluminum for reduced weight without sacrificing strength. Benefits Superior cooling under load — ideal for towing, off-road, and high-temperature environments. Improved engine reliability and performance longevity. Direct-fit replacement with OEM-quality build and enhanced efficiency. Choose CSF for a proven cooling upgrade that keeps your 4Runner running cooler, longer, and harder.