What makes CSF's B-Tube technology different from standard radiator tubes?

CSF's B-tubes are shaped like a "B" which increases the heat transfer surface area by about 15% compared to standard oval "O" shape tubes. This design also allows for "dual liquid laminar flow" and uses thinner, lighter aluminum that is stronger than welded tubes, all while improving cooling efficiency.

Does this radiator require any modifications to install on my BMW?

No, this CSF radiator is designed as a true 'drop-in fit'. It accepts all original attaching components, including quick-connect hoses, the AC condenser, and fan shroud, and uses CNC machined brackets for a precise and durable installation without modifications.

What is the warranty on this CSF radiator?

CSF offers a limited warranty on their radiators. Please refer to the manufacturer's warranty documentation for specific details regarding coverage and duration.

CSF Radiator 7078 - BMW M2 M235i 335i 435i

Name: CSF 15-18 BMW M2 (F87) / 12-16 BMW M235i/M235ix Radiator
Brand: CSF
SKU: csf-csf-15-18-bmw-m2-f87-12-16-bmw-m235i-m235ix-radiator-t14-205291
Price: 645.00 USD
Availability: InStock

CSF 15-18 BMW M2 (F87) / 12-16 BMW M235i/M235ix Radiator

$645.00

Only 7 left in stock

CSF high-performance all-aluminum radiator for BMW M2/M235i. Features B-Tube tech for improved cooling.

Key Features

Fits 2016-2018 BMW M2, 2015-2016 BMW M235i/M235i xDrive, 2014-2016 BMW M235i, 2013-2015 BMW 335i xDrive, 2015-2016 BMW 435i xDrive Gran Coupe, and 2014-2016 BMW 435i xDrive.
Features CSF's exclusive 2-row 42mm core with B-Tube technology, increasing heat transfer surface area by approximately 15% over standard tubes.
Utilizes ultra-efficient, multi-louvered fins precisely aligned to maximize airflow and heat rejection.
All-aluminum construction with a smooth satin finish.
Designed as a true 'drop-in fit', requiring no modifications and accepting all OEM attaching components including quick-connect hoses, AC condenser, and fan shroud.
CNC machined brackets and fittings ensure superb fit and durability.

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Product Details

CSF uses a specially engineered tube, shaped like a "B", which increases the heat transfer surface area by about 15% compared to standard oval tubes. This design allows for "dual liquid laminar flow" and uses thinner, lighter aluminum that's actually stronger than welded "O" shape tubes, all while improving cooling efficiency. This radiator is built for a range of BMWs, including the M2, M235i, 335i, and 435i models powered by the N55 engine.

The core features ultra-efficient, multi-louvered fins that are precisely aligned to maximize airflow and heat rejection, tested in a wind tunnel lab for optimal performance. CSF's B-Tube technology and these advanced fins work together to keep your N55-powered BMW running at its best, whether you're on the street or the track. This is a true drop-in fit, meaning it accepts all original attaching components like quick-connect hoses, the AC condenser, and fan shroud, and uses CNC machined brackets for durability and a precise fit.

This radiator replaces OEM part number 17118672103 and comes with a smooth satin finish. It's a solid choice for high horsepower builds or race vehicles needing that extra cooling performance. You can reuse your OEM or aftermarket hoses thanks to the designed-to-match inlet/outlet connections.