K&N Replacement Round Air Filter for 13-14 Audi RS6/RS7 4.0L V8 Drivetrain>Spindles 75" diameter into single 3"

75" diameter into single 3" Cat-Back™ system was developed for use on F-250 and F-350 Super Duty trucks with performance

The combination of this silicone inlet hose and our free-flowing Mishimoto air filter translated to massive gains of 20 whp and 17 wtq at 5900RPM

warp-resistant Dura-Flex 2000 material

For use w/ Ram-Air System: 2003-08 Ford 5

K&N Replacement Round Air Filter for 13-14 Audi RS6/RS7 4.0L V8 Drivetrain>Spindles 75" diameter into single 3"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