Eventuri glossy carbon direct intake kit BMW Serie 2 G87 M2 / 3 G80 G81 M3 / 4 G82 M4 + CS/CSL -

BMW G8X M2/M3/M4 CS/CSL

Performance improvement: 13-18 HP, 12-16 ft-lbs (stock tuning)
Turbo inlet area increased by up to 160%
Filtering area increased by up to 40%

*Some images show our optional carbon engine cover

Introducing our revised G8X M2/M3/M4 socket for mounting with the CSL Strut brace. We""ve done extensive research and development to develop an intake that not only improves on the stock M2/M3/M4, but is also future-proofed in its ability to accommodate high-horsepower builds well above 1000hp. Our system is a complete redesign from the airboxes to the turbo inlets with the goal of reducing pressure loss by increasing flow rate and keeping inlet temperatures low. We have maximized the use of available space to use 2 custom filters with a 40% larger filter area than stock. These are used in our patented Venturi housings to smoothly channel air to the turbo inlets. The inlets themselves have a cross-sectional area up to 160% larger than standard and are designed with an advanced grooved internal surface to reduce friction losses between the flow and the wall boundary. By allowing a “cushion” of air on the wall surface, airflow is able to move through inlets at higher flow rates with reduced pressure loss. This allows the turbos to take in air with less resistance and therefore reduce the exhaust valve duty cycle resulting in higher overall performance.

The Eventuri difference

The G8X M2/M3/M4 Eventuri system uses our patented carbon fiber housings with our custom-made Gen 2 filters, which provide an aerodynamically efficient airflow path from the filter to the turbos. Not just another heat shield cone filter, but a unique design that invokes the Venturi effect and maintains laminar flow conditions to reduce drag on the turbo. You can read more about the housing design and how it works HERE .

Dynamic Test

This grip has been independently dyno tested by BR Performance in Belgium. Back-to-back tests were performed against the stock airbox, and several tests were performed with each configuration. The tested car did not have carbon filters. We took the best results from the stock airbox and the best from the Eventuri system. The dyno results show a consistent gain throughout the rpm range which can be attributed to the turbos reaching peak boost earlier and with a lower wastegate duty cycle due to the increased efficiency of the intake system. This improvement comes despite the cell temperature on the test bench rising from 11.8 degrees C for the series system tests to almost 16 degrees C for the Eventuri tests. The performance improvement translates on the road into greater partial and full throttle response with the car pulling much more eagerly towards redline.

Product code:

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• EVE-G8XMV2-CF-INT : Carbon intake system BMW G87 M2, G80 G81 M3, G82 M4 - Gloss finish
  
• EVE-G8XMV2-CFM-INT : Carbon intake system BMW G87 M2 G80 G81 M3, G82 M4 - Matte finish
  
  
  

The Eventuri G8X M2/M3/M4 intake system consists of a series of components designed to serve 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:

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• 2 patented carbon fiber venturi filter housings
  
• 2 custom made high flow dry cone filters
  
• 2 carbon fiber inlet ducts
  
• Carbon fiber intake pipe
  
• 2 thermoplastic turbo inlets
  
• Laser cut stainless steel brackets
  
• Custom hose
  
• CNC machined bracket supports and reinforcement rings
  

FILTER HOUSING ASSEMBLIES

Filter housings include our custom-made second generation filters, aluminum inlet caps and stainless steel brackets. The carbon capsule wraps around the reverse mounted filter and smoothly shapes the airflow up to the tube section which then connects to the turbo tubes. This changes the flow path from the OEM airbox where the airflow enters the front of the airbox, changes direction 90 degrees to travel through the panel filter, and then changes direction 90 degrees again to travel through the tube section. Our system is much more direct with the airflow entering the front of the filter housing and moving into the tube section without abrupt changes in direction. The result is a smoother path from the filter to the turbo inlet pipe and therefore the turbo is able to operate with less resistance.

CUSTOM CONE FILTER

To achieve the highest possible flow rate, we have designed a new filter element to make the most of the space available in the engine compartment. This new filter has an outside diameter of 192mm or 7.6"" and when flow tested with a housing using a 4"" opening is capable of flowing up to 900 CFM at 28"" H2O. The filter media is ISO tested to ensure filtration is in line with OEM standards and is also dry. The filter is constructed with our signature flow cones to aid the venturi housing principle.

PATENTED TECHNOLOGY

Our patented filter housing features a gradual reduction in cross-sectional area as it wraps around the filter and tapers towards the tube. This geometry resembles the Venturi effect where the airflow accelerates while maintaining laminar conditions. Below is a diagram to show the comparison between our patented design and a normal intake system of air moving through the housings and allow for a uniform velocity profile as the airflow exits the housings. More details can be read on the Technology and Filters pages.

TURBO INPUTS

The biggest limitation in the stock system are the turbo ports. The G8X M2/M3/M4 has one inlet for each turbo and we were able to significantly increase the size of both. By increasing their size, turbos are able to take in air with fewer restrictions, therefore allowing for faster spooling. In the following photos you can see the differences in sizes. While the benefit may be small for a production car, we expect these larger vents to be more beneficial for higher states of tune where target boost pressures are increased.

We could have finalized the designs here, however we wanted to push the boundaries and introduce a new dimple pattern on the internal surfaces. In theory, small dimples can increase flow rate by reducing frictional pressure losses across a pipe. We explained it in detail in our video which you can find in the Video tab HERE .


We spent a lot of research and development simulating different sizes and shapes until we settled on an optimized version that demonstrated greater flow through inlets than a smooth surface. The application of such a complex system was only possible thanks to the advanced production technique we used to create the entrances, where traditional methods would not have guaranteed the required precision. The dimples create an ""air cushion"" effect on the inlet surface which then allows the main body of air to ""glide"" with less friction across the body into the turbo. This results in a more uniform velocity profile in a dimpled pipe with the net effect of a higher velocity for the same boundary conditions. Here are the CFD simulations showing the recirculations in the dimples and the increased velocity in the dimpled tube.

Flow studies on increasing the efficiency of the collector aspiration .

Hydrodynamics of laminar flow through pipes alveolates .

CARBON DUCTS

To ensure the intake is completely sealed, the filter housings are mated to these carbon ducts which channel cold air from the stock entry points behind the headlights. Made from pre-impregnated carbon fibre, the ducts ensure that heat from the engine compartment cannot enter the filters. Simply having heat shields would not work as effectively since they cannot be airtight. There are many small details designed into the ducts, such as the machined mounts to attach them to the stock airbox locations and the laser-cut bracket work.

CARBON MAIN PIPE

The filter housing on the right side of the engine is connected to a long pipe to direct the airflow to the turbo inlet. Our carbon tube replaces the stock version and has a smoother internal profile with increased volume. On the filter side it starts with a 4"" internal diameter and maintains this size until the turbo inlet where it tapers smoothly. The hose features integral brackets that help secure the hose in a fixed position. The complete system comes together to provide intake that enhances the performance, aesthetics and sound of the stock airbox. Available in a gloss or matte finish.