Note: Price is for quantity one K&N air filters. The Audi RS6 4.2L V8 twin turbo is equipped with 2 engine air filters from the factory. Replaces factory engine air filter, part number 077 133 843.

K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. K&N makes 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.

Product Features:
* A high-flow, washable filter that delivers the maximum amount of air possible into your engine while providing superior filtering
* Multiple layers of cotton fabric sandwiched between pleated aluminum screen capture airborne dirt particles
* Improves horsepower and torque
* Emission legal in all 50 states, will not void manufacturer's warranty
* Filters can be cleaned over and over, and are backed by a million mile limited warranty