The F40 M135i, F44 M235i (also suits F39 X2 M35i) Eventuri intake system was developed through extensive real world testing and airflow simulation analysis. It features our patented Venturi housing system with an integrated Mass Air Flow sensor section for the smoothest possible airflow to the turbo inlet tube. The housing encases our bespoke generation 2 dry filter which helps to shape the airflow to maintain laminar conditions. The housing seals to the front duct which has been maximised in volume to reduce any potential restrictions in flow. The duct ensures that only ambient air is provided to the filter thus IATs are steady for most driving conditions. The system allows for better throttle response and allows for the turbo to work with a lower waste-gate duty cycle.

The filter housing comprises of our bespoke generation 2 filter, aluminium inlet cowl, stainless steel bracket and the integrated MAF section. The carbon pod shrouds the reverse mounted filter and smoothly shapes the airflow down to the MAF section which then connects to the stock inlet tube. This changes the flow path from the OEM airbox where airflow enters the front of the airbox, changes direction by 90 degrees to travel through the panel filter and then changes direction again by 90 degrees to move through the MAF section. This system is a lot more direct with airflow entering the front of the filter housing and and moving into the MAF section without any abrupt direction changes. The result is a smoother path from the filter to the turbo inlet tube and therefore the turbo is able to function with less drag.

Eventuri's patented filter housing has a smooth reduction in cross sectional area as it shrouds the filter and tapers down to the tubing. This geometry invokes the Venturi effect where the airflow accelerates whilst maintaining laminar conditions. It can be thought of as a large velocity stack - below is a diagram to show the comparison between our patented design and a regular intake system. Our bespoke filters aid the airflow moving through the housings and allow for an even velocity profile as the airflow exits the housings.

Eventuri have redesigned the duct to maximise the internal volume. With the mounting points now hidden, the duct makes use of all the given space over the slam panel. In order to protect against engine bay heat - the duct has a flexible rubber edging around the opening to the filter housing which ensures a good seal to the filter as well as allowing movement with the engine.

All the components come together in the engine bay to produce a genuine improvement in the driving experience as well as providing an incredible visual display of form and function in complete harmony.

The Eventuri B48 F4x M135i, M235i intake system consists of a number of components engineered to perform a specific purpose and fabricated to the highest of standards.