K&N replacement air filters are designed to enhance horsepower and acceleration while maintaining superior filtration. With over 1,200 different models available, K&N caters to a vast majority of vehicles. These filters are washable and reusable, seamlessly integrating into your existing factory air box. Their drop-in design facilitates effortless performance enhancement. Simply remove the disposable air filter and replace it with a K&N filter, following the accompanying instruction sheet. K&N's stock replacement air filters for street vehicles are backed by the renowned Million-Mile Limited Warranty, ensuring they will be the final air filter your vehicle requires. K&N washable, reusable High-Flow Air Filters incorporate a state-of-the-art design of layered, oiled cotton media. This innovative design optimizes airflow while effectively capturing contaminants, resulting in an increase in horsepower. Each performance air filter is reusable, engineered for the lifetime of your vehicle, and supported by K&N's No-Hassle Lifetime Limited Warranty. K&N drop-in replacement filters are designed for easy installation into your factory air box.
- ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance
- RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
- 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants
- CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
- REUSABLE K&N FILTER SAVES YOU MONEY: A K&N washable, reusable air filter will save you up to $125 vs. purchasing multiple disposable filters (compared to MSRP in USD of corresponding OE filters for 200,000 miles of highway driving)
- ULTIMATE LONGEVITY: No-hassle lifetime limited warranty on stock replacement K&N air filters- limitations apply
- EASY INSTALLATION: K&N Air Filters are pre-oiled and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains
- REDUCES WASTE: Over 200 million disposable air filters and their packaging waste wind up in landfills each year- reusable filters help reduce waste in our landfills
Installation Instructions
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 |