The Eventuri X3/X4 M40i intake system consists of a series of components designed to perform a specific purpose and manufactured to the highest standards. We use 100% prepreg carbon fiber without glass fiber, which means we can achieve a smooth internal surface to maintain smoother airflow. Here are the details of each component and the design ethos behind them:

Each extraction system consists of:

• Carbon fiber air filter box
• Custom made high flow dry cone filter
• Carbon fiber inlet tube
• CNC machined temperature sensor holder
• CNC machined breather adapter
• CNC machined turbo flange
• Heat shield with golden reflective support
• Laser cut stainless steel brackets
• Silicon coupler with OEM specification terminals

Carbon Fiber Airbox

Made of prepreg carbon fiber, the airbox effectively seals the filter from the heat of the engine compartment. As the airbox is positioned next to the exhaust manifold, it is critical that the filter is completely sealed, so we have designed the airbox to encapsulate the filter whilst providing ample internal volume. To seal the intake pipe we designed a laser cut plate with a rubber sealing strip that attaches to the airbox. The intake hose passes through the plate and the rubber seal ensures that hot air does not enter the airbox. To further reduce heat absorption, there is an additional heat shield with a gold reflective layer on the side of the exhaust manifold which effectively combats radiant heat transfer.

Carbon inlet pipe

The stock inlet pipe has a flexible, twisted section to provide movement to the engine. This however also adds the possibility of turbulence in the flow path as there are more faces that can cause vortices. We replace it with our carbon tube which is smooth and also has a larger internal volume. Unlike most aftermarket intakes, we have maximized the size of our intake hose, the OEM intake hose has an internal diameter of 80.8mm or 3.2 inches at the filter end. Our pipe has an internal diameter of 109mm or 4.3″”. This equates to a massive 82% increase in cross-sectional area over stock. The pipe tapers smoothly towards the stock turbo inlet to ensure airflow remains as laminar as possible. The pipe also features CNC machined fitting for the temperature sensor and breather adapter.

Custom made cone filter

Our cone filter is made from a double layer non-woven mesh material and is ISO tested to ensure filtration is in line with OEM standards. The filter is washable and very stable at high temperatures as the filter media has a significantly larger surface volume than the panel filter as standard.