K&N Replacement Air Filter (33-2885) Audi > RS4 > (B7) V8 Following on from our very

Following on from our very successful intercooler for the RS3 8P chassis

Cotton mesh construction Replacement for the following kits:

Using a stiffer spring to keep the valve closed at a vacuum condition may result in too stiff of a spring tension to effectively discharge pressure at a throttle lift condition

Manufactured under the ISO 9001 quality system

It is used with the OEM diverter valve to vent extra boost air into the atmosphere instead of sending it back into the engine's intake piping

K&N Replacement Air Filter (33-2885) Audi > RS4 > (B7) V8 Following on from our veryK&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 No Hassle Lifetime Limited Warranty. K&N drop in replacement filters are designed to install easily into your