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Description

Eventuri Black Carbon Intake System for B9 Audi S4 & S5

Eventuri’s Audi B9 S4 / S5 intake is engineered to reduce restriction to the turbo while preserving low inlet temperatures. Because the S4 / S5 engine bay heat-soaks rapidly, Eventuri redesigned the entire inlet path from the turbo inlet to the front grille into a highly efficient sealed system. The restrictive OEM air box and flexible plastic inlet are replaced by a Venturi filter housing and smoothly transitioning ductwork. Eliminating the convoluted stock tube in favor of a one-piece Venturi housing and rigid inlet results in a far smoother airstream into the turbo. The outcome is industry-leading performance and aesthetics for the platform.

Carbon Intake Housing Assembly

Eventuri’s filter-housing assembly integrates a bespoke Gen 2 reverse-mounted filter, a carbon pod, and an integrated outlet tube matched in diameter to the factory turbo tube. By extending the housing and tube directly to the stock turbo connection and mounting to the engine, the design eliminates the need for a convoluted rubber hose; as the engine moves under load, the housing moves with it while an expanding rubber extrusion at the duct face maintains an airtight seal. The pod’s smooth, tapering cross-section invokes the Venturi effect accelerating airflow while preserving laminar conditions functioning like a large velocity stack. Eventuri’s bespoke filters further stabilize the airstream, promoting an even velocity profile at the housing exit. Additional technical details are available on the Technology and Filters pages.

Carbon Fiber Intake Duct

Eventuri’s duct channels ambient air from the scoop into the filter housing and establishes a sealed plenum of cool air ahead of the element for immediate supply. Maximizing the available engine-bay volume, the duct employs flexible rubber edging at its interfaces to the housing and OEM front duct, maintaining an airtight seal against engine-bay heat while allowing the assembly to move with the engine. To further enhance flow, a secondary rear opening draws from a cold region of the bay. This geometrically complex component is a core element of the B9 S4 / S5 intake design.

Carbon Fiber Air Scoop

Eventuri identifies the front carbon scoop as essential for directing ambient air into the duct and onward to the filter. Designed with a constant bend radius for maximum efficiency, the scoop guides incoming flow cleanly to the duct opening, helping minimize inlet temperatures and accelerating IAT recovery after heat soak during standstill.

Custom Bracket Work

Eventuri devotes significant development to application-specific mounting hardware. For the B9 S4 / S5 system, laser-cut stainless-steel brackets are powder-coated for durability, then paired with CNC-machined mounts that locate into the factory rubber grommets used by the OEM air box delivering an OEM-level fit. Together, these components elevate the driving experience and present a cohesive display of form and function within the engine bay.

Performance

Eventuri validated the B9 S4 / S5 intake with same-day VBOX testing on the same road, recording 60–130 mph and 100–200km/h acceleration. With only the intake added, 60–130 mph dropped from 14.72 s (stock) to 14.24s (Eventuri), and 100–200km/h improved from 12.45s to 12.12s, nearly half a second quicker at high speed. These road results underscore gains that exceed static dyno indications under real flow conditions. The advantages derive from three factors: a fully sealed system and front scoop that keep IATs low; a Venturi housing that transitions smoothly from filter to tube without a convoluted rubber section, preserving laminar flow for turbo efficiency; and construction from pure pre-preg carbon fiber, which insulates effectively against heat.

Features

Sealed carbon intake path from grille to turbo
Patented Venturi housing with integrated outlet tube
Prepreg carbon duct with sealed plenum and secondary cold-air opening
Front carbon scoop with constant-radius flow to minimize IATs
Laser-cut stainless brackets and CNC mounts for OEM-level fit
Reduced restriction and smoother, laminar airflow to the turbo

Specifications

Performance Gain:
- Horsepower: 13-17hp
- Torque: 15-20ft-lb
V-Box Acceleration: 60-130mph Reduced By 0.5 Seconds

What’s Included

Carbon Fiber Venturi housing with integrated tube
High Flow Generation 2 Filter
Carbon Fiber Intake Duct
Carbon Fiber Front Scoop
High Quality Silicon Couplers and OEM Spec Hose Clamps
Laser Cut Stainless Steel Bracket Work
CNC Machined Mounting Stubs

Applications

Audi S4: B9 (2016-2023)
[CWGD – 3.0L V6 turbo] [DECA – 3.0L V6 turbo]
Audi S5: B9 (2017-2023)
[CWUA – 3.0L V6 turbo] [DECA – 3.0L V6 turbo]

Notes

This item is not eligible for return
Installation Guide

About Eventuri

Eventuri was founded by a team of engineers and enthusiasts with a background in Aeronautics and tuning – all sharing a passion for cars and performance. After owning various intakes over many years for their own cars and being disappointed with the gains which seldom lived up to their claims – they decided to take things into our own hands and rewrite the book. To set a new benchmark in intake design and technology, above all – to engineer systems which provide real gains and then to publish genuine figures. Their systems are extensively developed using cutting edge design, testing and prototyping methods. With a focus on performance, each design undergoes CFD analysis and is then validated at the prototype stage through volumetric airflow, intake temperature and extensive dynamometer testing. They strive to publish all the development information to illustrate the depths they go to in bringing an intake from concept to reality. Only the best materials are selected for each component – even down to the choice of fasteners and fixings in order to ensure that the quality of the end product is second to none. After many years of disappointment with the usual aftermarket intakes, they are proud to be raising the bar and creating intake systems which are setting a new standard and genuinely improve the performance of your vehicle.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Eventuri Black Carbon Intake System for B9 Audi S4 & S5 [EVE-B9S5-CF-INT]

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Eventuri Black Carbon Intake System for B9 Audi S4 & S5

Carbon Intake Housing Assembly

Carbon Fiber Intake Duct

Carbon Fiber Air Scoop

Custom Bracket Work

Performance

Features

Specifications

What’s Included

Applications

Notes

About Eventuri

Reviews