Some info on the tune;

Some info on Karbonius air box ;

Our Karbonius CSL Style Airbox with 1,7 kgrs weight , made 100% in prepreg carbon fibre in autoclave at 125º. Replic of the original one based on 3D scan of the original one but presents several differences with the genuine BMW CSL Airbox. Among others: • Trumpets made in carbon fibre instead in plastic, what make our airbox even more light. •Diameter and shape of the trumpets modified, 51,5 mm diameter instead 50 mm and a round shape on the front of the trumpets contributes to a better airflow inside the engine. • Exclusive 6th trumpet design, the 6th trumpets it´s the less air gets , so we redesigned the shape of this trumpet to get more air and we constated 1hp gain with this modification. • We have also softened some shapes and varnished the interior, what contributes to minimize the turbulences inside the airbox . Besides, it includes the CNC machined-made items of aluminium and then anodized , aluminium threads and stainless-steel screws. We put a lot of attention to match the weave in the different places of our intake , that´s why the piece presents a perfect match between both sides and also create a hermetic seal with a neoprene foam gasket between front/rear part. Depending on the state of your car and mapping selected you could get up to 25HP, but sure you will get a better throttle response and a fantastic induction roar.