Karbonius Carbon Fibre CSL Airbox Snorkel Intake Duct for BMW E46 M3 S54 is the essential cold air feed and ram air intake upgrade for anyone running a CSL-style carbon airbox on an E46 M3. This premium BMW E46 M3 carbon fibre intake snorkel is a high quality replica of the OEM CSL plastic duct with OEM-style fitment, engineered to channel cold, high-pressure air from the front grille directly into the airbox for lower IAT, stronger mid-range and crisp throttle response. Manufactured in Spain from 100% prepreg carbon fibre and autoclave cured under ISO 9001 standards, it delivers outstanding strength, stability and a flawless motorsport finish at a featherweight approx. 350 g.
Perfectly matched to the Karbonius CSL carbon airbox, this E46 M3 CSL airbox snorkel is the proven solution for track day, fast road and motorsport builds seeking maximum cold air flow and reliable, repeatable performance without heat soak. We have installed and run this snorkel on our own and customer E46 M3 S54 builds and the fit, finish and results have been excellent. Customers consistently praise the premium weave quality, precise fitment and genuine performance benefits.
Key benefits and reasons to choose the Karbonius snorkel
- CSL conversion intake snorkel for BMW E46 M3 S54 that feeds cold air and provides a genuine ram air effect at speed
- Lower intake air temperatures to reduce heat soak and support consistent power on road and track
- High flow, aerodynamic profile that complements the Karbonius CSL carbon airbox
- 100% prepreg carbon fibre, autoclave cured for stiffness, strength and thermal stability
- Lightweight design at around 350 g for performance-focused builds
- OEM-like fitment for the S54 engine bay with a premium motorsport finish
- Individually numbered and supplied with a certificate of authenticity
- 2-year warranty against manufacturing defects
What you get
- Karbonius carbon fibre CSL snorkel intake duct for BMW E46 M3 S54
- CNC machined black anodised aluminium mounting hardware
- Certificate of authenticity
Technical highlights
- Material: 100% prepreg carbon fibre, autoclave cured
- Manufactured in Spain to ISO 9001 standards
- Approximate weight: 350 g
- High flow design to optimise cold air feed and ram air effect
- Precision moulding and premium weave quality
Fitment
- BMW M3 E46 with S54 engine
- Designed to complement the Karbonius CSL carbon airbox
Installation
- Professional installation recommended
- No cutting or drilling is typically required, though swapping some OEM parts may be necessary
- These parts are intended for track and race cars and minor adjustments may be required during fitting
Fitting service: Prefer a hassle-free install. Nforcd offers expert fitting in Warwickshire. Request a quote at Sales@nforcd.com.
Important installation notice
Although designed for an OEM-like fit, some minor adjustment may be required. Always test fit prior to any paint or permanent modification to the part or vehicle. Karbonius Composites will not be responsible for costs to revert the vehicle to its original condition or any painting expenses.
Warranty
- 2-year warranty against manufacturing defects
Legal and notes
- It is the customer’s responsibility to comply with local laws when using this product on public roads
- This is not a BMW original product
- Specified weights may vary by ± 10%
Estimated lead time: 12 weeks
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