Karbonius Carbon Fibre Airbox OEM Style - BMW E46 M3 / Z4M Civic (FK8) 3 kW at 5350 RPM

3 kW at 5350 RPM and torque increase of 5

Select the optional Akrapovic sound kit for adjustable sound

The 6Sixty Monoblock line are the best performing and strongest vehicle load specific wheels that can be made for your vehicle (In Forged grade aluminium)

The RS5/RS4 engine bay becomes heat soaked very quickly so simply having an open cone system would result in better airflow but with higher inlet temperatures

The inner edges are based on the optics of the M4 roof

Karbonius Carbon Fibre Airbox OEM Style - BMW E46 M3 / Z4M Civic (FK8) 3 kW at 5350 RPM2x2 Gloss Only The CSL Airbox is one of the most demanded improvements among BMW M3 E46 enthusiasts. That is both for performance gain, and for the sound it brings to the car. On the other hand, it is a laborious, time consuming and expensive modification. For those who are looking for similar sound to CSL airbox, but do not look for HP gain, we have developed the Karbonius OEM Style S54 airbox. It is a simplified version of CSL airbox, that, apart