Karbonius carbon fibre OEM Style Airbox for the S54 engine as found in the E46 M3 and Z4 M.

This airbox has been developed to generate CSL induction noise and also uses Karbonius’ renowned quality control and construction. It is made in 100% pre-preg carbon fibre, autoclaved at Karbonius’ facilities in Spain under ISO 9001 standards. This leads to the best finish available today, as well as perfect thermal and structural stability.

Karbonius also include CNC machined brackets and fixings and match the weave in the different places of the intake. That’s why this piece presents a perfect match between both sides, which also creates a hermetic seal with a neoprene foam gasket between front/rear part.

All Karbonius pieces are numbered, so its origin and authenticity are guaranteed.

CSL Breather Hose required for install.

For SMG cars, CSL SMG Expansion Tank required for install.

Lead time of 8-12 weeks when on back-order. Contact us for the latest lead times.