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