With over five decades of dedicated expertise in radiator manufacturing, CSF stands as a benchmark in automotive cooling solutions. The CSF 02-07 Impreza WRX/STI All-Aluminum Radiator, equipped with a built-in oil cooler, exemplifies this legacy by delivering superior cooling performance tailored specifically for the Subaru WRX and STI models from 2002 to 2007. Engineered for both street and track applications, this radiator is an essential component for high-performance builds and motorsport vehicles that demand enhanced thermal management under rigorous conditions.
At the core of this radiator’s advanced design lies CSF’s exclusive B-Tube Technology. Unlike conventional oval-shaped “O” tubes, the B-Tube features a unique “B” cross-sectional profile that is meticulously formed and seam-brazed to ensure structural integrity. This innovative approach allows the use of thinner, lighter aluminum material while simultaneously increasing cooling efficiency. The B-Tube’s design enhances the heat transfer surface area by approximately 15% compared to standard tubes, effectively doubling the heat dissipation capacity within the same spatial constraints. This results in a dual liquid laminar flow, optimizing coolant movement and heat rejection.
Complementing the B-Tube technology, the radiator incorporates ultra-efficient multi-louvered fins with a precise 6.5mm fin height. These fins are carefully aligned to maximize airflow through the core, ensuring optimal heat exchange. Each fin specification is rigorously calculated and validated in CSF’s wind tunnel laboratory, guaranteeing peak performance and reliability.
The CSF WRX/STI radiator is designed as a true “drop-in fit” solution, requiring no modifications during installation. All original equipment (OE) style brackets are CNC machined and welded to provide exceptional durability and precise fitment. The inlet and outlet connections are engineered to match OE standards, allowing seamless integration with OEM hoses or aftermarket components. This meticulous attention to detail ensures that the radiator not only performs at a high level but also maintains compatibility and ease of installation.
Key Features
- 2-Row 42mm Core (Dual Core) featuring CSF’s proprietary B-Tube Technology for enhanced heat transfer
- Ultra-efficient multi-louvered fins with 6.5mm fin height, optimized for maximum surface area and airflow
- CNC machined “quick-connect” inlet and outlet connections for secure and precise hose attachment
- CNC machined brackets and fittings ensuring superior fit, strength, and long-term durability
- All-aluminum race-style drain plug designed for efficient coolant drainage and maintenance
- 1-hour “mirror finish” hand polish enhancing corrosion resistance and aesthetic appeal
- “Drop-in fit” design compatible with all OEM components including quick connect hoses, AC condenser, mounting brackets, and fan shroud
Applications
| Year Range | Make | Chassis Code | Model | Trim | Engine / Trans / Etc | Notes |
|---|---|---|---|---|---|---|
| 2002-2005 | Subaru | GD/GG | Impreza | WRX | Turbocharged 2L H4 (Manual) | - |
| 2006-2007 | Subaru | GD/GG | Impreza | WRX | Turbocharged 2.5L H4 (Manual) | - |
| 2004-2007 | Subaru | GD/GG | Impreza | WRX STI | Turbocharged 2.5L H4 (Manual) | - |
OEM Part Numbers
- Subaru: 45111FE000
- Subaru: 45119FE000
Warranty Information
Cooling Systems and Flexibles, Inc. (CSF) guarantees the quality and performance of its High-Performance Cooling Systems under normal use and service conditions. This warranty is extended to the original purchaser of the vehicle in which the product was initially installed. For comprehensive warranty details, please visit our Warranty Page.
SKU# 3076O Warranty Term: 2 years
The CSF 02-07 Impreza WRX/STI All-Aluminum Radiator with built-in oil cooler embodies the highest standards of quality, engineering, and reliability. It is meticulously crafted to meet the demanding requirements of performance enthusiasts and professional racers alike, ensuring consistent engine cooling and longevity. By integrating advanced materials, innovative design, and precision manufacturing, CSF delivers a product that not only enhances vehicle performance but also maintains strict adherence to OEM fitment and durability standards.
Choosing this radiator means investing in a component that has been tested and proven to withstand the stresses of high horsepower applications and competitive motorsport environments. Its dual-core configuration and optimized airflow characteristics effectively reduce engine temperatures, preventing overheating and maintaining optimal operating conditions. The built-in oil cooler further contributes to thermal management by cooling engine oil, which is critical for sustaining engine performance and preventing premature wear.
Installation is straightforward due to the “drop-in fit” design, which eliminates the need for custom modifications or additional fabrication. This feature ensures minimal downtime and preserves the integrity of the vehicle’s original setup. The CNC machined brackets and fittings provide a secure mounting solution that resists vibration and mechanical stress, enhancing overall system reliability.
In summary, the CSF 02-07 Impreza WRX/STI All-Aluminum Radiator is a superior cooling solution that combines innovative engineering with practical design considerations. It is ideal for Subaru owners seeking to improve their vehicle’s cooling efficiency, whether for daily driving, spirited street performance, or competitive racing. Trust in CSF’s extensive experience and commitment to quality to deliver a radiator that meets and exceeds industry standards.
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.