Performance Air Filter for Audi A6/Allroad II (2004-2011)

High-Flow BMC Induction Upgrade: Audi C6 A6 & Allroad (V6/V8 Platforms)

Who It’s For: Engineered for Audi A6 (4F/C6) and Allroad II owners running the V6 and V8 powerplants who want to eliminate the "laggy" tip-in throttle response common in these heavy executive cruisers.

The Symptom: The factory air intake system on the Audi C6 chassis is a masterpiece of noise suppression, but a disaster for fluid dynamics. To keep the cabin silent, Audi engineers used thick, dense paper filters that create a significant pressure drop across the airbox. This restrictive media forces the engine to work harder just to breathe, especially on the high-displacement 3.0 TFSI and 4.2 FSI engines, resulting in a sluggish feeling when you’re trying to merge into fast-moving traffic or pull away from a stoplight.

The Engineering Fix: This BMC replacement filter utilizes a multi-layered cotton gauze approach rather than the disposable paper found at the dealership. By utilizing four layers of long-strand cotton soaked in a low-viscosity oil, we can achieve filtration down to 7 microns (outperforming the OEM 10-micron standard) while significantly reducing air resistance. The "Full Moulding" construction ensures the filter maintains a perfect seal within the airbox, preventing "dirty air" bypass and ensuring the intake air remains dense and laminar for better combustion efficiency.

Why Mechanics Choose This Kit

• Optimized Air Velocity: By reducing the intake restriction, we allow the turbochargers (on TDI/TFSI models) to spool faster and the naturally aspirated V6/V8s to reach peak volumetric efficiency sooner in the RPM band.
• Industrial Strength Build: Unlike cheaper aftermarket filters that use glued joints, BMC uses a single-mould system. This eliminates the risk of the frame cracking or separating under the high-heat conditions of an Audi engine bay.
• Sustainable Performance: This is the last filter you’ll buy. It is fully washable and regenerable, maintaining its flow characteristics for the life of the vehicle with basic maintenance.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• Audi A6 (4F/C6) 2.4 V6 (177 HP) 2004 > 2008
• Audi A6 (4F/C6) 2.7 TDI V6 (163 HP) 2004 > 2011
• Audi A6 (4F/C6) 2.7 TDI V6 (180 HP) 2004 > 2008
• Audi A6 (4F/C6) 2.7 TDI V6 (190 HP) 2008 > 2011
• Audi A6 (4F/C6) 2.8 FSI V6 (190 HP) 2008 > 2011
• Audi A6 (4F/C6) 2.8 FSI V6 (210 HP) 2006 > 2008
• Audi A6 (4F/C6) 2.8 FSI V6 (220 HP) 2008 > 2011
• Audi A6 (4F/C6) 3.0 TDI V6 (211 HP) 2004 > 2011
• Audi A6 (4F/C6) 3.0 TDI V6 (226 HP) 2004 > 2006
• Audi A6 (4F/C6) 3.0 TDI V6 (233 HP) 2006 > 2008
• Audi A6 (4F/C6) 3.0 TDI V6 (239 HP) 2008 > 2011
• Audi A6 (4F/C6) 3.0 TFSI V6 (290 HP) 2008 > 2011
• Audi A6 (4F/C6) 3.0 TFSI V6 (299 HP) 2008 > 2011
• Audi A6 (4F/C6) 3.0 V6 (218 HP) 2004 > 2006
• Audi A6 (4F/C6) 3.2 FSI V6 (256 HP) 2004 > 2011
• Audi A6 (4F/C6) 3.2 FSI V6 (265 HP) 2009 > 2011
• Audi A6 (4F/C6) 4.2 FSI V8 (350 HP) 2006 > 2011
• Audi A6 (4F/C6) 4.2 V8 (335 HP) 2004 > 2006
• Audi ALLROAD II (4FH) 2.7 TDI V6 (163 HP) 2006 > 2011
• Audi ALLROAD II (4FH) 2.7 TDI V6 (180 HP) 2006 > 2008
• Audi ALLROAD II (4FH) 2.7 TDI V6 (190 HP) 2008 > 2011
• Audi ALLROAD II (4FH) 3.0 TDI V6 (211 HP) 2006 > 2011
• Audi ALLROAD II (4FH) 3.0 TDI V6 (232 HP) 2006 > 2008
• Audi ALLROAD II (4FH) 3.0 TDI V6 (239 HP) 2008 > 2011
• Audi ALLROAD II (4FH) 3.0 TFSI (290 HP) 2008 > 2011
• Audi ALLROAD II (4FH) 3.2 FSI V6 (256 HP) 2006 > 2008
• Audi ALLROAD II (4FH) 4.2 FSI V8 (350 HP) 2006 > 2011

Interchange Part Numbers:

FB573/08, FB57308

The Performance Promise

Buy with confidence. At our shop, we don’t believe in "universal" fits. This BMC filter is engineered specifically for the C6 Audi airbox geometry, ensuring a drop-in installation with no modifications required. Expect a cleaner intake sound, sharper throttle response, and the peace of mind that comes from Italian-made filtration technology.