CSL Airbox E30 Swap for S54 Engine

Price range: 1.745,00 € through 1.845,00 € VAT not included

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Prices are expressed in euros and do not include shipping costs, taxes, or additional fees.

Product description

The Karbonius CSL Airbox E30 Swap for S54 engine is a high-performance intake designed specifically for BMW E30 with S54 engine conversions. Inspired by the iconic CSL Airbox from the BMW M3 E46, this component offers a perfect combination of lightness, performance and motorsport sound.

Manufactured entirely in prepreg carbon fiber and autoclave-cured at 120ºC, it guarantees a premium finish and excellent thermal and structural stability. Its development has been based on a 3D scan of the original part, achieving one of the most accurate and highly regarded replicas on the market.

This version has been specifically optimized for the E30 chassis, incorporating modifications that reduce interference with the brake servo and bodywork, thus facilitating its integration in S54 swap projects.

Requires remapping

Benefits of CSL Airbox E30 Swap for S54 Engine

  • Enhanced engine performance through optimized airflow
  • Weight reduction (only ~2.5 kg) compared to OEM systems
  • Spectacular CSL-type intake sound
  • Optimized fitment for E30 with S54 swap
  • Maximum manufacturing quality in prepreg carbon fiber
  • High thermal and structural resistance
  • Exclusive, numbered and certified product
  • Considered one of the best CSL replicas on the market

 

 

Technical information and specifications

  • Model: Karbonius CSL Airbox E30 Swap
  • Compatibility: BMW E30 with S54 engine
  • Weight: ~2.5 kg (±10%)
  • Material: 100% prepreg carbon fiber
  • Manufacturing: mold and autoclave cured (120ºC)
  • Molds: high-precision aluminum
  • Included components:
    • Intake body
    • Certificate of authenticity
  • Not included: air filter (available separately)
  • Additional details:
    • Anodised aluminium machined parts
    • Exclusive, numbered part
  • Warranty: 3 years against manufacturing defects

E30-specific adaptations:

  • Rear redesign to reduce interference with brake servo
  • Removal of front lower ducting to avoid bodywork contact

How to install the product

  • Difficulty: Medium
  • Requires remapping
  • Does not require cutting or drilling, but professional installation is recommended
  • May require additional auxiliary parts (not included): clamps and hoses
  • Depending on vehicle year, OEM components may be reused or new ones purchased from BMW dealership

Key recommendations:

  • Installing a smaller brake servo is recommended to avoid interference. Common options:
    • BMW E21 servo
    • Porsche 944 or VW Golf Mk2 servo
    • Aftermarket systems (Wilwood or similar)
  • May require adjustments to:
    • Brake pedal rod
    • Master cylinder compatibility

Warnings

  • Product intended for motorsport/competition use
  • It is the customer’s responsibility to verify legality for road use
  • Non-original BMW product
  • Prices do not include shipping, taxes, customs duties or fees
  • Weight with possible variation of ±10%

Important installation notice:

  • Although designed with OEM-type fitment, it may require minor adjustments
  • Inspecting the part before installation is recommended
  • Karbonius is not responsible for claims regarding installation, painting or other costs if the part has been modified before verifying proper fitment

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