K&N’s lifetime replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for virtually every vehicle on the road. These filters are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. Simply remove the disposable air filter and replace it with a K&N; there is NEVER any cutting or fitting required. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED.

Product Specifications

Product Style: Round Air Filter
Height: 7.25 in (184 mm)
Inner Wire: No
Inside Diameter: 4 in (102 mm)
Outside Diameter: 5.75 in (146 mm)
Top Style: Open
Top Material/Finish: None
Filter Re-Oiling Amount: 1.57 oz (47 ml)

Applications: 

AUDI A8 3.0L V6 - All 2002-05
AUDI A8 3.2L V6 - All 2005, 2007
AUDI A8 3.7L V8 - All 2004, 2006
AUDI A8 3.7L V8 - Round Filter 2002-03
AUDI A8 4.2L V8 - All 2002-07
AUDI A8 QUATTRO 4.2L V8 - All 2005-07
AUDI A8 QUATTRO 6.0L W12 - All (2 required) 2005-07