K&N 2001-2009 Audi A4/RS4/S4 Drop In Air Filter - 33-2209

K&N Engineering is a renowned leader in high-performance air filtration and induction systems, dedicated to providing superior airflow, engine protection, and enhanced performance. Made in the USA, K&N designs and manufactures a wide range of products, including washable air filters, cold air intakes, and performance air filtration systems, for vehicles, motorcycles, trucks, and more. With over 50 years of innovation, K&N utilizes advanced cotton-gauze technology to deliver exceptional filtration while boosting horsepower and fuel efficiency. Trusted by automotive enthusiasts and racing professionals worldwide, K&N Engineering continues to set the standard for quality, durability, and performance in the automotive industry.

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!

Technical Bulletin


This Part Fits:

Year	Make	Model	Submodel
2002-2008	Audi	A4	Base
2003-2009	Audi	A4	Cabriolet
2002-2008	Audi	A4 Quattro	Avant
2002-2008	Audi	A4 Quattro	Base
2004-2009	Audi	A4 Quattro	Cabriolet
2007-2008	Audi	RS4	Base
2008	Audi	RS4	Cabriolet
2004-2008	Audi	S4	Avant
2004-2008	Audi	S4	Base
2004-2009	Audi	S4	Cabriolet

Fitment Years: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009.