K&N PERFORMANCE AIR FILTER AUDI A4 S4 RS4 A6 KN-33-2125, VW PASSAT

K&N PANEL FILTER 33--2125 TO Suit : 
AUDI S4 2.7 V6 97-02
AUDI Allroad 2.7 Turbo 00-05
AUDI A6 3.0 V6 02-04
AUDI S6 4.2L V8 02-04
AUDI A6 2.0 97-05
AUDI A4 2.8 V6 94-01
AUDI A6 2.5L V6 DSL 98-04
AUDI A4 Quattro Turbo 1.8L 97-01
AUDI Allroad Quattro 2.5L V6 DSL 00-05
AUDI A4 1.6L 95-00
AUDI A6 S6 RS6 2.8 97-04
AUDI RS4 2.7L V6 00-03
AUDI ALLROAD QUATTRO 4.2L V8 02-05

VW Passat 1.9 TDi 96-05
VW Passat 2.3 V5 96-05
VW Passat 2.0 00-05
VW Passat 2.8 V6 96-05
VW Passat 4.0L W8 01-04 
VW Passat 1.8 96-00
VW Passat 2.8 00-05
VW Passat 2.0 TDi 03-05

K&N's 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 washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N.
The Importance of Oil
A K&N Air Filter is made of 4 to 6 layers of cotton gauze sandwiched between two epoxy-coated aluminum wire screens.  The cotton is treated with a specially formulated grade of oil causing tackiness throughout the cotton’s microscopic strands.  The nature of the cotton allows high volumes of airflow, and when combined with the tackiness of the oil creates a powerful filtering media that ensures engine protection.