CSF 08-14 Subaru WRX & STI w/ built-in Oil Cooler All-Aluminum Radiator

With over five decades of expertise in radiator manufacturing, CSF stands as a trusted leader in high-performance cooling solutions. The CSF 08-14 Subaru WRX & STI All-Aluminum Radiator with built-in oil cooler is engineered to maintain optimal engine temperatures, ensuring your vehicle performs reliably under both street and track conditions. This radiator is an essential upgrade for high horsepower builds and race vehicles that demand superior cooling efficiency in rigorous motorsports environments.

At the core of this radiator lies a 2-Row 42mm design featuring CSF’s proprietary B-Tube Technology. Unlike conventional oval-shaped "O" tubes, CSF’s "B" shaped tubes are precision-engineered and seam-brazed to create a stronger, lighter, and more thermally efficient structure. This innovative design increases the heat transfer surface area by approximately 15% compared to standard tubes, effectively delivering the cooling capacity of two smaller tubes within the same spatial constraints. The dual liquid laminar flow achieved through these B-tubes enhances coolant circulation, further optimizing heat dissipation.

Complementing the advanced tube design are ultra-efficient multi-louvered fins, meticulously aligned to maximize airflow through the radiator core. Each fin’s dimensions and configuration are carefully calculated and validated in CSF’s wind tunnel testing facility to ensure maximum heat rejection performance. This attention to detail results in a radiator that excels in both thermal management and durability.

The CSF WRX/STI radiator offers a true “drop-in fit” installation, requiring no modifications to your vehicle. All brackets are CNC machined and welded to OE specifications, providing superior strength and longevity. The inlet and outlet connections are designed to match original equipment manufacturer (OEM) fittings, allowing seamless integration with existing OEM hoses or compatible aftermarket components. This ensures a hassle-free upgrade while maintaining the integrity of your vehicle’s cooling system.

Key Features

• 2-Row 42mm Core (Dual Core) incorporating CSF’s Exclusive B-Tube Technology for enhanced heat transfer and structural strength
• Ultra-efficient fin design with 6.5mm fin height and multi-louvered pattern to maximize surface area contact and airflow
• CNC machined “Quick-Connect” inlet and outlet connections for precise fitment and ease of installation
• CNC machined brackets and fittings engineered for exceptional durability and exact OE compatibility
• All-aluminum race-style drain plug for reliable fluid drainage and maintenance
• One-hour “Mirror Finish” hand polish providing superior corrosion resistance and aesthetic quality
• “Drop-in fit” design that accepts all OEM attaching components including quick connect hoses, AC condenser, mounting brackets, and fan shroud without modification

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.