CSF Audi B8 S4/S5 & 3.0L/3.2L Audi Models High-Performance All-Aluminum Radiator

With over five decades of dedicated expertise in radiator manufacturing, CSF stands as a benchmark for quality and reliability in automotive cooling solutions. The CSF Audi B8 S4/S5 & 3.0L/3.2L Audi Models High-Performance All-Aluminum Radiator is engineered to meet the rigorous demands of both street performance and competitive motorsports environments, ensuring optimal engine temperature management under all operating conditions.

This radiator is meticulously designed with a 2-Row 42mm core incorporating CSF’s exclusive B-Tube Technology, a significant advancement over traditional oval-shaped "O" tubes. The innovative "B" shaped tubes are precision-formed and seam-brazed to create a structure that is not only stronger but also lighter and more thermally efficient. This design enhances the heat transfer surface area by approximately 15%, effectively delivering the cooling performance equivalent to two smaller tubes within the same spatial constraints. The dual liquid laminar flow facilitated by the B-tubes optimizes coolant circulation, resulting in superior heat dissipation.

Complementing the core technology, the radiator features ultra-efficient multi-louvered fins with a 6.5mm fin height, carefully aligned to maximize airflow and thermal exchange. These fins are engineered and tested in CSF’s state-of-the-art wind tunnel laboratory to ensure maximum heat rejection efficiency tailored to each specific application.

The CSF Audi radiator is a true "Drop-in fit" component, designed for seamless installation without the need for any modifications. All OE-style brackets are CNC machined and welded, ensuring exceptional durability and precise fitment. The inlet and outlet connections are CNC machined to match original equipment specifications, allowing for the reuse of OEM hoses or compatible aftermarket components. Additionally, the radiator incorporates an upgraded plate-type transmission oil cooler integrated into the left side tank, enhancing transmission cooling performance for automatic transmission models. This cooler comes pre-plugged for manual transmission variants, underscoring the versatility of the design.

Features

• 2-Row 42mm Core (Dual Core) Featuring CSF's Exclusive B-Tube Technology
• Core with Ultra-Efficient Fins: 6.5mm Fin Height and Multi-Louvered Design for Maximum Surface Contact
• CNC Machined "Quick-Connect" Inlet and Outlet Connections for Precise Fit
• CNC Machined Brackets and Fittings to Ensure Durability and Accurate Installation
• All-Aluminum Race Style Drain Plug for Enhanced Reliability
• Smooth Satin Finish Providing a Professional Appearance and Corrosion Resistance
• "Drop-in Fit" Design Requiring No Modifications – Compatible with OEM Components Including Quick Connect Hoses, AC Condenser, Mounting Brackets, and Fan Shroud

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.