CSF BMW E82 1M / 08-11 E8X 135i / 07-11 E9X 335i / E89 Z4 (AT) All-Aluminum Radiator

With over five decades of expertise in radiator manufacturing, CSF stands as a leader in delivering advanced cooling solutions tailored for high-performance BMW models. The CSF BMW E82 1M / 08-11 E8X 135i / 07-11 E9X 335i / E89 Z4 (AT) All-Aluminum Radiator exemplifies this commitment to quality and engineering excellence, ensuring optimal engine temperature regulation for both street and track applications.

This radiator is meticulously engineered to meet the demands of high horsepower builds and motorsport environments where enhanced cooling capacity is critical. Featuring a robust 2-Row core, it incorporates CSF's proprietary B-Tube Technology, a distinctive advancement over conventional oval-shaped "O" tubes. Unlike standard designs, CSF’s "B-tubes" are precision-formed and seam-brazed, resulting in a structure that is both lighter and stronger. This innovation allows the use of thinner aluminum material without compromising durability, thereby improving thermal conductivity and overall cooling efficiency.

The unique "B" shape increases the heat transfer surface area by approximately 15% compared to traditional tubes, effectively delivering the cooling performance of two smaller tubes within the same spatial constraints. This design also facilitates dual liquid laminar flow, enhancing coolant circulation and heat dissipation. Complementing this, the radiator employs ultra-efficient multi-louvered fins with a 6.5mm fin height, precisely aligned to maximize airflow through the core. Each fin specification is carefully calculated and validated through rigorous wind-tunnel testing to ensure superior heat rejection performance.

Installation is straightforward due to the radiator’s true "Drop-in fit" design, requiring no modifications. All mounting brackets are CNC machined and welded for exceptional strength and durability, maintaining OEM standards. The inlet and outlet connections are CNC machined to match original equipment specifications, enabling seamless compatibility with OEM hoses or aftermarket alternatives. This ensures that all factory components, including quick-connect hoses, AC condenser, mounting brackets, and fan shroud, can be retained without alteration.

Features

• 2-Row 42mm Core (Dual Core) Featuring CSF's Exclusive B-Tube Technology
• Core with Ultra-Efficient Fin Design: 6.5mm Fin Height and Multi-Louvered Configuration for Maximum Surface Area Contact
• CNC Machined "Quick-Connect" Inlet/Outlet Connections for Precise Fitment
• CNC Machined Brackets and Fittings Delivering Superior Durability and OEM-Level Fit
• All-Aluminum Race Style Drain Plug Enhancing Reliability and Maintenance
• Smooth Satin Finish for Enhanced Corrosion Resistance and Aesthetic Appeal
• "Drop-in Fit" Installation Requiring No Modifications; Compatible with All OEM Components Including Quick-Connect Hoses, AC Condenser, Mounting Brackets, and Fan Shroud

Applications

OEM Part Numbers

• BMW: 17117547059

Warranty

Cooling Systems and Flexibles, Inc. (CSF) guarantees the performance and quality of its High-Performance Cooling Systems under normal use and service conditions to the original purchaser of the vehicle in which the product was initially installed. This warranty underscores CSF’s dedication to reliability and customer satisfaction. For comprehensive warranty information, please visit our Warranty Page.

SKU# 7046 Warranty Term: 2 years

In summary, the CSF All-Aluminum Radiator for BMW E82 1M, E8X 135i, E9X 335i, and E89 Z4 (Automatic Transmission) represents a superior cooling solution engineered to meet the highest standards of performance and durability. Its advanced B-Tube Technology, precision CNC manufacturing, and rigorous testing ensure this radiator delivers exceptional thermal management, maintaining engine efficiency and longevity under demanding conditions. Whether for daily driving or competitive motorsport use, this radiator provides a reliable, direct-fit upgrade that aligns with OEM specifications and enhances your vehicle’s cooling system integrity.

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.