K&N Replacement Round Air Filter for 13-14 Audi RS6/RS7 4.0L V8 Drivetrain>Spindles Where a catch can placed

Where a catch can placed on the crankcase vent system on the left side of the engine will yield very little accumulation on stock or lightly modified vehicles

featuring our unique filter-to-housing interface

Using FEA (Finite Element Analysis) our CNC milled 6061-T6 Billet Aluminum arms are designed to exceed factory strength and durability

Bypass design provides the ultimate

K&N Replacement Round Air Filter for 13-14 Audi RS6/RS7 4.0L V8 Drivetrain>Spindles Where a catch can placedK&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