Karbonius Carbon Fibre Airbox OEM Style - BMW E46 M3 / Z4M S4 (B7) Dyno Graph (Headers + Evolve

Dyno Graph (Headers + Evolve Exhaust only Conversion)

Unlike AUX-based CarPlay interfaces that rely on analog audio input

but do not look for HP gain

AUX-based CarPlay systems

Karbonius Carbon Fibre Airbox OEM Style - BMW E46 M3 / Z4M S4 (B7) Dyno Graph (Headers + Evolve2x2 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