CSF 6th Gen Subaru Outback/Legacy High-Performance All-Aluminum Radiator

The CSF 6th Gen Subaru Outback/Legacy High-Performance All-Aluminum Radiator is engineered to meet the demanding cooling requirements of the robust 2.5L (FB25) naturally aspirated engine, particularly under the strenuous conditions encountered during off-roading and overlanding. These activities impose significant stress on the engine due to factors such as traction loss, steep inclines, and the additional weight of gear, often resulting in elevated operating temperatures. The factory radiator may not adequately manage these increased thermal loads, which can compromise engine performance and longevity. To address this challenge, CSF has developed a high-performance radiator that enhances cooling efficiency and durability for the Subaru Legacy and Outback models.

At the core of this radiator is a 42mm thick, 2-row aluminum core that significantly increases the fluid capacity compared to stock units. This design not only allows for greater coolant volume but also improves heat dissipation capabilities. CSF’s exclusive B-Tube Technology further advances thermal management by enhancing heat transfer by approximately 15% over conventional oval welded tubes. Complementing this innovation, the radiator incorporates multi-louvered fins that maximize airflow through the core, thereby optimizing heat exchange efficiency. This is particularly important in off-road scenarios where vehicle speeds are generally lower, and cooling relies heavily on fan-driven airflow rather than natural ram air.

While factory fans provide a baseline level of airflow, they are often insufficient to maintain optimal engine temperatures during low-speed, high-load conditions typical of off-road driving. The larger and more efficient core of the CSF radiator ensures that engine temperatures remain within safe operating limits, promoting consistent engine performance and reliability. Additionally, the increased core size offers a buffer against reduced cooling efficiency caused by environmental contaminants such as dust, dirt, and mud, which frequently accumulate on radiators in rugged terrains. By providing greater overall cooling capacity, this radiator mitigates the risk of overheating even when airflow is partially obstructed.

Durability and structural integrity are paramount in the design of this radiator. The end tanks are fabricated from high-grade aluminum and are TIG welded to the core, delivering superior strength and resistance to failure compared to the OEM design, which utilizes plastic end tanks crimped onto the core—a known weak point prone to leaks and damage. This all-aluminum construction ensures a robust and long-lasting cooling solution capable of withstanding the rigors of demanding driving conditions.

Installation is straightforward and user-friendly, as the CSF radiator is designed as a true plug-and-play, drop-in fit replacement. This eliminates the need for any modifications, trimming, or cutting, allowing for a seamless upgrade that maintains factory fitment standards and vehicle aesthetics.

Features

• 2-Row - 42mm Ultra-High-Performance Core for enhanced cooling capacity
• Cooling Tubes incorporating CSF's Exclusive B-Tube Technology for approximately 15% improved heat transfer
• 6.5mm Tall Ultra Efficient Fins with a Multi-Louvered Design to maximize surface area contact and airflow
• CNC Machined Mounting Brackets and OEM Style Inlet/Outlet for precise fitment and durability
• 100% All Aluminum TIG-Welded Construction ensuring superior strength and longevity
• Smooth Satin Finish providing corrosion resistance and professional appearance
• True Plug-and-Play "Drop-in Fit" Installation requiring absolutely no modifications
• Individually Leak and Pressure Tested to guarantee reliability and performance
• 2-Year Limited Warranty reflecting CSF’s commitment to quality and customer satisfaction

Applications

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.