Performance Air Filter for Audi A6 C8 / C9 & A7 4K 2.0 & 3.0 (2018-2026)

High-Flow BMC Performance Panel Air Filter for Audi A6 & A7 (C8 / 4K)

What it Does: The BMC performance air filter directly replaces the restrictive factory paper element on the Audi A6 and A7 to maximize intake CFM, reduce pressure drop, and sharpen turbo throttle response.

The Stock Audi A6 & A7 Airflow Restriction

Factory C8 and 4K platform intakes rely on dense, tightly packed cellulose paper filters engineered for extended service intervals rather than aerodynamic efficiency. Under wide-open throttle, these paper elements create parasitic drag within the airbox, increasing vacuum levels ahead of the turbocharger compressor inlet.

This airflow bottleneck delays boost threshold, exacerbates turbo lag on turbocharged EA839 and EA888 engines, and degrades rapidly when exposed to ambient atmospheric moisture.

The Engineering Solution

Engineered using low-viscosity oiled multi-layer cotton gauze, the BMC drop-in element provides significantly higher volumetric flow rates while maintaining fine particulate filtration down to 7 microns. The filter media is encapsulated within an epoxy-coated alloy mesh to prevent pleat collapse under high boost induction loads.

Molded using a continuous one-piece polyurethane perimeter gasket, this panel provides an airtight seal inside the factory airbox, eliminating unfiltered bypass and ensuring seamless MAF sensor metering without throwing trouble codes.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• Audi A7 (4K) 40 TDI Mild Hybrid 2.0 (204 HP) | 2018-2025
• Audi A7 (4K) 45 TFSI 2.0 (245 HP) | 2018-2020
• Audi A7 (4K) 45 TFSI Mild Hybrid 2.0 (265 HP) | 2020-2025
• Audi A7 (4K) 50 TFSI e 2.0 (252 HP) | 2019-2020
• Audi A7 (4K) 50 TFSI e 2.0 (265 HP) | 2021-2025
• Audi A7 (4K) 55 TFSI e 2.0 (252 HP) | 2019-2020
• Audi A7 (4K) 55 TFSI e 2.0 (265 HP) | 2021-2025
• Audi A6 (4A/C8) 2.0 30 TDI MHEV (136 HP) | 2019-2020
• Audi A6 (4A/C8) 2.0 35 TDI MHEV (163 HP) | 2019-2025
• Audi A6 (4A/C8) 2.0 40 TDI e MHEV (190 HP) | 2019-2020
• Audi A6 (4A/C8) 2.0 40 TDI MHEV (204 HP) | 2018-2025
• Audi A6 (4A/C8) 2.0 40 TFSI MHEV (204 HP) | 2020-2025
• Audi A6 (4A/C8) 2.0 45 TFSI MHEV (265 HP) | 2020-2025
• Audi A6 (4A/C8) 2.0 45 TFSI MHEV (245 HP) | 2018-2020
• Audi A6 (4A/C8) 2.0 50 TFSI e-hybrid Phev (299 HP) | 2019-2025
• Audi A6 (4A/C8) 2.0 55 TFSI e-hybrid Phev (367 HP) | 2019-2025
• Audi A6 (4A/C8) 3.0 55 TFSI MHEV (340 HP) | 2018-2024
• Audi A6 (C9) 2.0 TDI MHEV (204 HP) | 2024+
• Audi A6 (C9) 2.0 TFSI MHEV (204 HP) | 2024+

OEM Cross Reference (BMC): AUDI 4K0133844A, AUDI 4K0133844E

Frequently Asked Questions & Fitment Warnings

Does this fit the C8 A6 and 4K A7?

Yes, this is a direct drop-in replacement for the factory airbox on C8 chassis Audi A6 and A7 models equipped with the EA839 3.0T and EA888 2.0T engines. Always verify your factory airbox shape prior to ordering.

Does this filter require an ECU tune or re-oiling before installation?

No tuning is required, and the BMC filter arrives pre-oiled from the factory ready for immediate, drop-in installation.

The Audi Performance Standard

Maintain your Audi's precision German engineering with race-proven induction hardware that delivers zero check-engine lights, factory MAF compatibility, and fully washable, regenerable long-term reliability.