APR aprCI100050 4.0T Carbon Fiber Intake System for 2021–2025 Audi RS6 Avant and RS7 Sportback (C8)

The APR 4.0T EA825 Intake System is here for the Audi (C8) RS6 and RS7!The APR Intake System is a substantial upgrade for the 4.0T EA825 engine. It offers significant horsepower and torque gains through a high flow design that greatly increases airflow while reducing pressure drop.We've upgraded every part that actually translates to increased performance. Throttle response sharpens, as the system lets your engine to breath more freely. This causes the turbochargers to work less hard, which directly translates to the gains you feel. On top of that, the stunning carbon fiber and aluminum design looks fantastic in the engine bay and adds a pleasant auditory note to the engine. The filter is washable and reusable, and the cast aluminum turbo inlets use adapter rings with ideal entrances, making them compatible with larger turbochargers. This lets the system support even higher airflow levels, with low pressure drop, and even more horsepower and torque as you continue to mod!Design Overview and Testing:There was no component overlooked in the search for performance; the airbox, filter, couplers, and turbo inlets were each extensively analyzed and modified for maximum flow. The upgraded APR filter unit, featuring a low restriction cotton gauze media, flows 8% more than stock without sacrificing air quality. Flow is further improved by 52% larger airbox outlets, and 93% larger turbo inlets. The significantly improved APR turbo inlets are compatible with turbos featuring up to a 29% larger inlet port; various inlet adapters ensure that the APR intake will provide optimized flow for a wide range of turbos. Overall flow improvements of the intake result in a 50% reduction in pressure drop compared to OEM. The APR intake flows 19% less than the theoretical maximum supported by the OEM turbo inlet port diameter; a significant improvement compared to the OEM intake which flows 37% less than the theoretical maximum. Fits 2021-2025 Audi RS6 Avant/RS7 Sportback This product has received updates to accomidate new model years. Systems built prior to August 23rd 2024 are only designed to directly fit up to MY2022 vehicles. However, existing systems can be converted to the new system using the information in the attached instruction document.

• Inlet piping diameter is maximized from the airbox outlets to the turbocharger inlets
• 93% larger aluminum turbocharger inlets with adapter rings for larger turbochargers
• Billet turbo adapter rings make fitting this system to larger turbo possible
• +47 AWHP & +38 AWFT-LBS at the wheels measured over stock (Stage 1 93)
• High flow and washable pleated cotton gauze filter material
• Smooth and high flow turbocharger inlet pipe couplers
• Inlet piping addresses the main system restriction
• 50% reduction in pressure drop at the turbo inlets
• Carbon Fiber airbox with 52% larger airbox outlets
• Turbos operates more efficiently
• Enhanced engine sound
• Turbos spool faster
• Emissions friendly

The APR 4.0T EA825 Intake System is a high-flow upgrade for the C8 Audi RS6 Avant and RS7 Sportback. Its optimized airbox, filter, couplers, and turbocharger inlet design increase airflow, reduce pressure drop, and help the turbochargers operate more efficiently. The system is designed to sharpen throttle response, support faster turbo spool, and provide an enhanced engine sound.

Key Features & Performance Benefits

• High-flow design: Maximizes inlet piping diameter from the airbox outlets to the turbocharger inlets.
• Reduced restriction: Delivers a 50% reduction in pressure drop at the turbo inlets compared with the OEM system.
• Performance gains: Measured gains of +47 AWHP and +38 AWFT-LBS at the wheels over stock on Stage 1 93.
• Turbocharger support: Aluminum turbocharger inlets with billet adapter rings accommodate turbochargers with inlet ports up to 29% larger.

Key Product Specifications & Technical Data

• Brand: APR
• Part number: aprCI100050
• Application: Audi 4.0T EA825 engine
• Airbox: Carbon fiber construction
• Airbox outlets: 52% larger than stock
• Turbocharger inlets: 93% larger than stock
• Filter: Washable, reusable pleated cotton gauze media
• Filter flow: 8% greater than stock

What's Included

The APR intake system includes the carbon fiber airbox, washable pleated cotton gauze filter, aluminum turbocharger inlets, billet turbo adapter rings, inlet piping, and turbocharger inlet pipe couplers.

Fitment

Fits 2021–2025 Audi RS6 Avant and 2021–2025 Audi RS7 Sportback models. Systems built before August 23, 2024, are designed to directly fit up to 2022 model-year vehicles; existing systems may be converted for newer model years using the applicable instruction document.

Fitments:
2021 Audi RS6 Avant Base
2021 Audi RS7 Sportback Base
2022 Audi RS6 Avant Base
2022 Audi RS7 Sportback Base
2023 Audi RS6 Avant Base
2023 Audi RS7 Sportback Base
2024 Audi RS6 Avant Performance
2024 Audi RS7 Sportback Performance
2025 Audi RS6 Avant GT
2025 Audi RS6 Avant Performance
2025 Audi RS7 Sportback Performance
2026 Audi RS6 Avant Performance
2026 Audi RS7 Sportback Performance

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1