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:
Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.
It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.
We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.
We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.
All in stock products ship the same day if ordered before 2pm GMT
For out of stock items we will contact you with an estimated wait time if not otherwise specified above.
We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy
All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.
PLEASE NOTE
- Orders with both in-stock and backorder or out-of-stock products will be dispatched once all products are available to ship together.
- Contact our sales team if you want your parts fitted to your vehicle at our London workshop.
- Shipping estimates are based on courier delivery times and don't include time to despatch from our warehouse.