CSF BMW F2X 1/2-Series / F3X 3/4-Series (AT) High-Performance All-Aluminum Radiator

With over five decades of expertise in radiator manufacturing, CSF stands as a trusted leader in delivering high-performance cooling solutions. The CSF BMW F2X 1/2-Series / F3X 3/4-Series (AT) High-Performance All-Aluminum Radiator exemplifies this legacy by combining advanced engineering with durable materials to ensure optimal engine cooling and reliability for your BMW.

Engineered specifically for the F2X and F3X chassis equipped with automatic transmissions, this radiator is designed to meet the rigorous demands of both street driving and competitive motorsports. Whether your vehicle is a high horsepower build or a race-prepared machine, maintaining efficient thermal management is critical, and CSF’s radiator provides the enhanced cooling capacity necessary to protect your engine under strenuous conditions.

At the core of this radiator’s superior performance is CSF’s exclusive B-Tube Technology. Unlike conventional oval-shaped "O" type tubes, the B-Tubes are uniquely shaped and seam-brazed to create a stronger, lighter, and more thermally efficient structure. This innovative design allows the use of thinner aluminum material, which not only reduces weight but also improves heat dissipation. The B-Tube’s inlet positioned centrally along the seam increases the heat transfer surface area by approximately 15% compared to traditional tubes, effectively delivering the cooling efficiency of two smaller tubes within the same spatial constraints.

Moreover, the B-Tube configuration facilitates dual liquid laminar flow, enhancing coolant circulation and heat rejection. Complementing this technology are ultra-efficient multi-louvered fins, precisely aligned to maximize airflow through the radiator core. Each fin’s specifications—including a 6.5mm fin height—are meticulously engineered and validated through wind tunnel testing to ensure maximum heat rejection efficiency, contributing to the radiator’s ability to maintain optimal engine temperatures even in demanding environments.

The CSF F2X/F3X radiator is designed as a true "drop-in fit" replacement, requiring no modifications during installation. This ensures a seamless integration with your vehicle’s existing cooling system components. The radiator features CNC-machined and welded OE-style brackets for enhanced durability and precise fitment. Inlet and outlet connections are engineered to match OEM specifications, allowing the reuse of original or aftermarket hoses without compromise.

Key Features

• 2-Row 42mm Core (Dual Core) incorporating CSF’s proprietary B-Tube Technology for superior strength and cooling efficiency
• Ultra-efficient multi-louvered fins with 6.5mm fin height, optimized for maximum surface area contact and airflow
• CNC-machined "quick-connect" inlet and outlet connections for precise fit and ease of installation
• Robust CNC-machined brackets and fittings, ensuring exceptional durability and alignment
• All-aluminum race-style drain plug designed for reliability and ease of maintenance
• Refined smooth satin finish for corrosion resistance and professional appearance
• True "drop-in fit" design compatible with all OEM components including quick-connect hoses, AC condenser, mounting brackets, and fan shroud
• Direct replacement for OEM part number 17117618807, ensuring compatibility and performance

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.