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Unitronic Carbon Fiber Turbo Inlet for 3.0TFSI EA839 - Now Available

Feb 20th, 2024 Products

Unitronic® is proud to release its Carbon Fiber Turbo Inlet for the B9 and B9.5 Audi® S4® and S5® equipped with the 3.0TFSI® EA839 engine. This S4 / S5 Turbo Inlet is designed to dramatically improve airflow with gains of up to 57% over the factory unit while supporting both the stock turbocharger and TTE710 / TTE810 hybrid turbochargers via Unitronic's clever 53mm and 65.7mm adapter rings. For even greater performance gains, this Carbon Fiber Turbo Inlet can be paired with our complete Carbon Fiber Intake System which is comprised of a high-flow airduct and airbox as well. As with all Unitronic Intake upgrades, this unit provides improved throttle response, seamless integration and perfect fitment while greatly enhancing turbo induction sounds. Its stunning 2/2 twill carbon fiber weave adds a striking presence in the 3.0TFSI engine bay as well.



At Unitronic, development begins with setting the objectives; performance, efficiency, aesthetics and quality. Operations start with 3D scanning the 3.0TFSI engine bay and OEM components with its in-house 3D scanner. Once 3D scan data has been collected and processed, Unitronic Hardware Engineers then interact with the 3D models to identify fitment constraints, mounting locations, other component locations, etc. to ensure the final product fits perfectly within the “envelope”.


As the initial designs develop; evolution begins with rapid prototyping utilizing our in-house Stratasys 3D printer. Within hours, Unitronic Engineers are able to have a complete working printed prototype, allowing for test fitments to be performed on the vehicle, functional testing to be completed and flow data collected to further validate the designs.


Unitronic Hardware Engineers then carefully benchmarked the OEM Audi S4 and S5 turbo inlet versus the Unitronic Carbon Fiber Turbo Inlet in a controlled environment using our in-house Superflow SF-1020 flow bench. Our team observed massive air flow gains of up to 57% with the Unitronic Turbo Inlet versus the OEM inlet. This drastic air flow improvement allows the turbocharger to work more efficiently and achieve target boost with less stress resulting in improved reliability.


Constructed of high quality carbon fiber, this premium Turbo Inlet features a large 85mm bore and smooth transitions to draw massive amounts of non-turbulent air from the airbox. Using our unique 53mm or 65.7mm adapter rings, this Turbo Inlet is designed to work with the factory turbocharger or the TTE710 / TTE810 hybrid turbochargers for the B9 3.0TFSI platform. A factory style PCV connection is maintained for OEM-level fitment on the B9 S4 and B9 S5 as well.




Go one step further with a complete Carbon Fiber Intake System which is also compatible with this new Turbo Inlet for maximum performance on the B9 / B9.5 Audi S4 and S5. Comprised of a carbon fiber airduct which mates up to the large opening in the OEM grille and carbon fiber airbox (which is shared with other B9 2.0TFSI and 2.9TFSI applications), this complete intake system takes full advantage of the available room in the engine bay in order to maximize the air being fed into the turbocharger. The airbox features diagonal slits which enhance turbocharger induction sounds and DV recirculation sounds with drainage provisions for water ingress as well.




Our pursuit for perfection is applied even in the most minute areas of product design and in this case, we leaned on our abundant experience developing Intake Systems to incorporate high quality EPDM couplers for this B9 3.0T Intake System. These durable EPDM couplers allow ample tolerance for engine movement on an item that is both affixed to a dynamic engine and a rigid chassis.

CF intake couplers

This offers a superior amount of flexibility over traditional silicone, while still offering, with its clever design, the rigidity and strength to be highly reliable on the 3.0TFSI engines. Taking the design and engineering one step further, Unitronic engineers created a design that allows for smooth, laminar airflow on the inside walls, while maintaining flexibility through the means of a non-collapsing structural rib profile. Unitronic EPDM couplers are designed to perfectly align with the bead rolls on the carbon fiber tubes, to ensure a perfect and seamless connection; hose clamp guides ensure perfect alignment.

CF intake coupler flow

This sectional of the coupler shows a 3D CFD representation of airflow across the ribbed profiled construction. The ID of the ribs matches the ID of the interconnecting tubes for a seamless transition. As a result, even under varying conditions where flexing and stretching happen, airflow remains uninterrupted.


The Unitronic Carbon Fiber Turbo Inlet and Carbon Fiber Intake System for the B9 / B9.5 Audi S4 and S5 offer superior fit and finish which directly bolt-on to your vehicle using our very own proprietary mounting grommets. As with all Unitronic Performance Hardware, this Carbon Fiber Turbo Inlet and Carbon Fiber Intake System are sure to impress in the most demanding driving scenarios. They are also backed by Unitronic's limited lifetime warranty to the original purchaser as well.



• 2/2 Twill prepreg carbon fiber weave

• Autoclave construction

• 57% more airflow than stock

• Modular adapter rings (53mm or 65.7mm) for the stock turbocharger or TheTurboEngineers TTE710 / TTE810 hybrid turbochargers

• EPDM couplers

• High-quality stainless steel hose clamps

• Direct bolt-on fitment with OEM Mounting Locations & EPDM mounting grommets

• Smooth airflow transitions

• Proven airflow gains


2018+ Audi S4 3.0TFSI

2018+ Audi S5 3.0TFSI

Buy Now Unitronic B9 3.0TFSI Turbo Inlet

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