BMW 1 Series Radiator - CSF - High-Performance All-Aluminum with B-Tube Technology - Smooth Satin - `11-`27
BMW 1 Series Radiator - CSF - High-Performance All-Aluminum with B-Tube Technology - Smooth Satin - `11-`27
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BMW 1 Series Radiator - CSF - High-Performance All-Aluminum with B-Tube Technology - Smooth Satin - `11-`27. A premium drop-in cooling upgrade engineered for demanding street and track use.
CSF’s 2-row 42mm core uses exclusive B-Tube construction that increases internal surface area by approximately 15% versus conventional O-tubes, improving heat transfer while remaining strong and lightweight. Ultra-efficient multi-louvered fins (6.5mm fin height) are optimized for airflow, and CNC-machined OE-style brackets plus quick-connect fittings deliver a precise drop-in fit with OEM or aftermarket hoses. The all-aluminum build includes a race-style drain plug and Smooth Satin finish. Application: E82 1M, 08–11 E8X 135i, and 07–11 E9X 335i (M/T).
Features
- 2-row 42mm core with CSF B-Tube Technology (~15% more tube surface area)
- Multi-louvered fins (6.5mm height) tuned for airflow
- CNC-machined OE-style brackets and fittings
- Quick-connect inlet/outlet; accepts OEM components (hoses, condenser, fan shroud)
- All-aluminum construction with race-style drain plug
- Smooth Satin finish; true drop-in fit (CSF #7045)
Have questions or planning a build? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We have locations in Austin, Texas and the Los Angeles, California area, where we offer installation and customization services.
Thinking about purchasing multiple items? Contact us for shipping discounts. We install on premises at both locations.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Need Assistance?
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Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
and get assistance from one of our sales team members!
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