CSF 03-09 Toyota 4Runner / 06-14 FJ Cruiser Heavy-Duty All-Aluminum Radiator

With over five decades of expertise in radiator manufacturing, CSF stands as a benchmark in automotive cooling solutions. The CSF 03-09 Toyota 4Runner / 06-14 FJ Cruiser Heavy-Duty All-Aluminum Radiator embodies this legacy, delivering exceptional cooling performance tailored for both on-road reliability and off-road endurance. This radiator is engineered to meet the rigorous demands of off-road enthusiasts, overlanders, and adventurers who require uncompromising engine cooling under the most challenging conditions. At the core of this radiator lies a 2-Row 42mm core that incorporates CSF’s proprietary B-Tube Technology. Unlike conventional oval-shaped “O” tubes, CSF’s “B-tubes” are uniquely designed with a “B” shaped cross-section, which are precision-formed and seam-brazed to ensure superior structural integrity. This innovative design allows the use of thinner, lighter aluminum material without sacrificing strength, resulting in enhanced cooling efficiency. The “B-tube” configuration increases the heat transfer surface area by approximately 15% compared to traditional tubes, effectively delivering the cooling capacity of two smaller tubes within the same spatial constraints. This design facilitates a dual liquid laminar flow, optimizing the heat exchange process and maintaining optimal engine temperatures even during intense operation. Complementing the advanced tube design, the radiator features ultra-efficient multi-louvered fins with a 6.5mm fin height. These fins are meticulously aligned and engineered to maximize airflow through the radiator core, enhancing heat dissipation. Each fin specification is carefully calculated and validated through rigorous wind-tunnel testing at CSF’s dedicated laboratory, ensuring maximum heat rejection efficiency tailored specifically for the Toyota 4Runner and FJ Cruiser applications. The CSF radiator is designed as a true “drop-in fit” replacement, requiring no modifications for installation. This precision fitment is achieved through CNC-machined and welded OE-style brackets that guarantee exceptional durability and alignment. The inlet and outlet connections are CNC-machined to match original equipment specifications, allowing seamless integration with OEM hoses or aftermarket components. This ensures that all attaching components—including “quick connect” hoses, AC condensers, mounting brackets, and fan shrouds—are compatible and easily installed, preserving the vehicle’s original configuration and functionality. Whether your driving involves demanding off-road trails, heavy towing, or everyday commuting, the CSF Heavy-Duty All-Aluminum Radiator offers dependable cooling performance that meets the highest industry standards. CSF’s commitment to quality and reliability ensures that your Toyota 4Runner or FJ Cruiser maintains optimal operating temperatures, protecting your engine from overheating and enhancing overall vehicle longevity. Features 2-Row 42mm Core (Dual Core) Featuring CSF’s Exclusive B-Tube Technology for Enhanced Strength and Cooling Efficiency Ultra-Efficient Multi-Louvered Fins with 6.5mm Fin Height to Maximize Surface Area and Airflow CNC Machined “Quick-Connect” Inlet and Outlet Connections for Precise Fit and Compatibility CNC Machined Brackets and Fittings Engineered for Superior Durability and OEM-Level Fitment All-Aluminum Race Style Drain Plug for Robustness and Easy Maintenance Smooth Satin Finish Providing Corrosion Resistance and Aesthetic Appeal True “Drop-in Fit” Design Requiring No Modifications, Compatible with All OEM Components Including Hoses, AC Condenser, Mounting Brackets, and Fan Shroud Applications Year Range Make Chassis Code Model Trim Engine / Trans / Etc Notes 2003-2009 Toyota 4th Gen 4Runner – 4L V6 – 2007-2014 Toyota XJ10 FJ Cruiser – 4L V6 (Manual) – 2007-2014 Toyota XJ10 FJ Cruiser – 4L V6 (Automatic) – OEM Part Numbers Toyota: 16400 31354 Toyota: 16400-31354 Toyota: 1640031354 Toyota: 16400 31353 Toyota: 16400-31353 Toyota: 1640031353 Toyota: 16400 31352 Toyota: 16400-31352 Toyota: 1640031352 Toyota: 16400 31351 Toyota: 16400-31351 Toyota: 1640031351 Toyota: 16400 31350 Toyota: 16400-31350 Toyota: 1640031350 Toyota: 16400 75454 Toyota: 16400-75454 Toyota: 1640075454 Toyota: 16400 75453 Toyota: 16400-75453 Toyota: 1640075453 Toyota: