Eventuri Carbon intake system for Audi RS4 B9

Tailor-made carbon intake system / intake solution, for real power and torque increase for Audi B9 RS4 from Eventuri

• Performance increase: 13-17hp, 15-20ft-lbV-Box
• Acceleration: 100-200 km/h reduced by 0.5 seconds

The Audi B9 RS4/RS5 Eventuri intake system is designed to give the turbo a less restrictive airflow while maintaining low inlet temperatures. The RS5/RS4 engine bay is very prone to heat build-up, so simply using an open filter system would result in better airflow at higher inlet temperatures. Therefore, we have completely redesigned the airflow from the turbo inlet to the front grille with a highly efficient sealed system. The stock restrictive airbox and flexible plastic inlet pipe have been replaced with our patented venturi filter housing and a smooth transition duct system. The twisted fabric inlet pipe is replaced with our venturi housing and integrated full carbon pipe, resulting in a more consistent airflow entering the turbo inlet pipe. The resulting performance gains and aesthetics are industry leading for this platform.

Available with or without optional air intake in real carbon.

The improvements arise from a combination of reasons:

Included components

• Patented carbon fiber venturi housing with integrated high-flow tube filter
• Generation 2 carbon main air duct with expanding seal
• carbon secondary air intake
• carbon front air deflector
• Laser-cut stainless steel mounting brackets
• CNC-machined mounting pins
• Carbon intake housing construction

The filter housing consists of our bespoke Generation 2 filter, carbon housing and integrated pipe. The carbon housing encloses the rear mounted filter and gently shapes the airflow down to the turbo pipe, which is the same diameter as the turbine inlet. This is a key feature of the intake concept where we have eliminated the requirement for a seamless transition to a coiled rubber hose between the intake and the engine. The filter housing and integrated pipe extend to the stock turbo pipe and by mounting it on the engine the entire filter housing moves with the engine. As the engine and filter housing moves under acceleration it is able to maintain a seal to the duct through an expanding rubber profile mounted on the face of the duct.

This gentle reduction in cross-sectional area creates the Venturi effect, where the airflow is accelerated while maintaining laminar conditions. It can be thought of as a large funnel. Nicely seen in the diagram showing the comparison between our patent pending design and an OEM intake system. Our custom filters assist the airflow through the housings and allow for a consistent velocity profile as the airflow exits the housings.

Carbon Main Air Duct with Expanding SealThe duct directs ambient air from the scoop to the filter housing. It also creates a sealed volume of ambient air in front of the filter that the system can draw air from at any time. The duct has been designed to make the most of the volume available in the engine bay. To ensure a good seal against engine bay heat, the duct is additionally fitted with a flexible rubber rim around the openings that press against the filter housing and OEM front duct, creating the desired seal while allowing the housing to move with the engine. To further improve airflow, we have an additional opening at the rear of the duct in the cold area of ​​the engine bay