WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.The factory radiator in the E46 M3 often struggles to maintain stable operating temperatures during high-load track sessions or in high-horsepower street builds. The CSF 7058 addresses these thermal limitations by replacing the standard single-pass design with a Triple-Pass Flow Structure. This configuration forces coolant to flow across the core three times before exiting, ensuring the lowest possible outlet temperatures by maximizing the time spent in the heat exchange process.
This radiator utilizes CSF's exclusive B-Tube technology, which increases the heat transfer surface area by approximately 15% compared to standard oval tubes. The design uses thinner, lighter aluminum that is structurally stronger than conventional welded tubes, allowing for better cooling efficiency without sacrificing durability. Combined with ultra-efficient 6.5mm multi-louvered fins, this unit is built to handle the demands of competitive motorsports.
Key Features
- Triple-Pass Flow Structure for maximum cooling efficiency
- 2-Row 42mm core featuring exclusive B-Tube Technology
- 6.5mm fin height with multi-louvered design for increased surface area
- CNC-machined Quick Connect inlet and outlet connections
- CNC-machined brackets and fittings for precise fitment
- All-aluminum race-style drain plug
- Smooth satin finish
- Drop-in fit requires no modifications to factory components
Specifications
| Core Material | Aluminum |
| Tank Material | Aluminum |
| Core Configuration | 2-Row, 42mm (1.625 in) Thick, Cross Flow |
| Core Dimensions | 22.9375 in Height x 15.3125 in Width |
| Inlet/Outlet | Quick Connect, 1.5 in Diameter |
| Finish | Satin |
| OEM Cross Reference | 17102228941 |
Fits
Fits the BMW E46 M3 chassis. This unit is specifically designed for the S54-powered M3 platform to provide enhanced thermal management for both street and track environments.
Installation
This is a true drop-in fit application. It installs in the OEM location using factory mounting hardware, quick-connect hoses, the AC condenser, and the factory fan shroud. No cutting or custom brackets are required. CSF recommends following the manufacturer repair manual for standard installation procedures or utilizing a qualified installation facility.
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