CSF E9X 325i / 330i / 328i / E8X 128i / 09-10 BMW E89 Z4 All-Aluminum Radiator

With over five decades of dedicated expertise in radiator manufacturing, CSF stands as a benchmark in automotive cooling solutions. The CSF E9X 325i / 330i / 328i / E8X 128i / 09-10 BMW E89 Z4 All-Aluminum Radiator embodies this legacy, delivering superior cooling performance essential for maintaining optimal engine temperatures under various driving conditions. Engineered for both street use and competitive motorsports, this high-performance radiator is indispensable for vehicles requiring enhanced cooling capacity, particularly those with high horsepower configurations or engaged in rigorous track activities.

This radiator features an advanced 2-Row core design incorporating CSF's proprietary B-Tube Technology. Unlike conventional oval-shaped "O" tubes, the innovative "B" shaped tubes are meticulously formed and seam-brazed to ensure robust structural integrity. This design enables the use of thinner, lighter aluminum material without compromising strength, resulting in improved cooling efficiency. The unique inlet placement within the tube increases the heat transfer surface area by approximately 15% compared to standard tubes, effectively doubling the cooling capacity within the same spatial constraints. The implementation of "dual liquid laminar flow" through these B-tubes further enhances thermal management, ensuring consistent engine temperature regulation.

Complementing the core technology, CSF employs ultra-efficient multi-louvered fins precisely aligned to optimize airflow through the radiator. Each fin is engineered with a 6.5mm height and a multi-louvered design, maximizing the surface area contact for superior heat dissipation. These specifications are rigorously tested in CSF's wind-tunnel laboratory to guarantee peak heat rejection performance tailored to the specific application.

Installation is straightforward due to the radiator’s true "Drop-in fit" design, which requires no modifications. The CNC-machined and welded OE-style brackets ensure exceptional durability and fitment precision. Inlet and outlet connections are engineered to match original equipment manufacturer (OEM) standards, allowing seamless reuse of OEM hoses or compatibility with aftermarket components. This attention to detail reflects CSF’s commitment to providing reliable, high-quality cooling solutions that meet or exceed OEM specifications.

Features

• 2-Row 42mm Core (Dual Core) Featuring CSF's Exclusive B-Tube Technology
• Core Features an Ultra-Efficient Fin with 6.5mm Fin Height and Multi-Louvered Design for Maximum Surface Area Contact
• CNC Machined "Quick-Connect" Inlet/Outlet Connections
• CNC Machined Brackets and Fittings for Superb Fit and Durability
• All-Aluminum Race Style Drain Plug
• Smooth Satin Finish
• "Drop-in Fit" Requiring No Modifications to Install - Accepts All Attaching OEM Components Including "Quick Connect" Hoses, AC Condenser, Mounting Brackets and Fan Shroud

The CSF radiator is engineered to meet the demanding requirements of the following BMW models:

Applications

OEM Part Numbers

• BMW: 17117559273
• BMW: 17117562079
• BMW: 17 11 7 559 273
• BMW: 17 11 7 562 079
• BMW: 17-11-7-559-273
• BMW: 17-11-7-562-079

CSF's commitment to quality extends

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.