Our 4.0TFSI V8 EA825 intake represents a complete redesign and optimization of the entire air inlet system. Each component, including the lid, has been meticulously crafted to enable the V8 twin turbos to draw in air with minimal resistance, leading to industry-leading performance enhancements.

The standard airbox lid imposes a limitation on the size of the flow collector that supplies air to the inlets from the filters. To address this issue, we have elevated the central section of the lid to accommodate a larger flow collector and larger cone filters. This eliminates the inherent restriction and distinguishes our intake from others in the market, where the use of the standard lid necessitates a restricted collector and filtration media.

Additionally, our turbo inlets boast a cross-sectional area up to 43% larger than the stock counterparts. They feature an advanced dimpled inner surface that reduces frictional losses between the airflow and the wall boundary. This design creates a “cushion” of air at the wall surface, enabling smoother airflow through the inlets at higher rates with minimal pressure loss.

As a result, the turbos can draw in air with reduced resistance, leading to a decrease in wastegate duty cycle and ultimately delivering higher overall performance.

Performance Gain Stock Map: 14-20hp, 17-21ft-lb
Performance Gain Stage 1 Map*: 25-28hp, 20-23ft-lb

*Actual performance gains may vary depending on different ECU tunes.

The Eventuri 4.0TFSI V8 intake system consists of a number of components engineered to perform a specific purpose and fabricated to the highest of standards. We use 100% pre-preg carbon fiber with no fibreglass which means we can achieve a smooth internal surface to maintain smoother airflow. Here are the details for each component and the design ethos behind them:

*Gains measured can vary with different ECU tunes.

The first constraint we had to overcome in order to dramatically increase the overall volume of the intake was the airbox lid. The stock lid leaves a shallow opening for the flow collector and also restricts the filtration medium being used. By creating a raised portion in the middle of the lid we are able to create more space for a larger flow collector and also for larger filters. The lid is made from prepreg carbon fibre and uses the same mounting points as the stock lid.

Directing the airflow from the filters to the turbo inlets is the flow collector. The stock one is constricted in size due to eth stock kid but having removed that restriction, we were able to dramatically increase the volume of our version. In addition, this also gave us the freedom to replace the stock filter with higher flowing cone filters which also have a larger total surface area.

The biggest restriction in the stock system are the turbo inlets. The stock inlets not only are small in size but they also have 2 flexible sections. The flexible section immediately in front of the turbo creates turbulence as the engine moves under acceleration. To combat this, the stock inlets also have flow guides at the exit of the inlets but these also create a restriction. We removed the first flexible section which also meant that we could increase the internal volume. By increasing the inlet sizes, the turbos are able to pull in air with less restriction hence allowing for a quicker spool. In the following photos you can see the differences in the sizes.

We could have finalised the designs here however, we wanted to push the boundaries further and introduce a novel dimpled pattern to the inside surfaces. In theory, small dimples can increase the flow rate by reducing the frictional pressure losses through a tube.