CSL Airbox
by Haimus Racing
These CSL airboxes are complex - the engineering & design expertise is not only for reliability, but also performance.
The Haimus Racing kit has visibly gone through many revisions to ultimately reach this current state of design.
My airbox was another step for Antonio as he introduced the Frozen matte finish: it's a beautiful piece of kit.
I documented every step and options an often misunderstood upgrade for the S5: buying the airbox is only half the way there.
I hope you find value here.
Matt / @m3_epoustouflant![]()
My deep dive
Engineered for reliability & performance
In collaboration with Antonio, I detail my unboxing impressions and cover every little details on his CSL airbox design.
The transparency in his approach to design, and the unique performance & reliability features made this airbox my choice on The Phoenix build.
The Specs
Flow optimized trumpets
They create more midrange power then any OEM CSL replica airbox from 3000 to 7500 rpm.
Threaded locked, CNC'ed fittings
All fittings are physically locked into the carbon housings with a thread and custom nut.
Repositioned IAT sensor
The IAT Sensor bung is placed closer to the front of the airbox compared to the OE design. This has been proven to avoid heat soak issues.
Finishing Options
You can spec your airbox in a combination of Gloss or Matte clear coat and stickers under the clear.
5 years structural warranty
The finish warranty varies from 3 to 5 years depending on your finishing specs.
Pre-Preg Carbon
Pre-preg carbon is used for its superior tensile strength & enables a thin walled construction for optimal sound.
The Snorkel
A simplified, no flap design in ABS plastic.
Spec your airbox
Required hardware
When in doubt, use a checklist. The complete required and optional CSL airbox hardware list.
Tuning Options
Understand the various OEM DMEs of the S54, how it affects your costs, and the related tuning hardware required.
Don't want to run Alpha N tuning? You'll need the conversion kit below.
Antonio @ Haimus Racing
Made in Bulgaria
Haimus Racing is a manufacturer focused on BMW M Clubsport components: products that can evolve on the track, and on the street.
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