K&N E-3690 Round Air Filter 11"OD,9-1/4"ID,6"H ymm_79 Disc Diameter (mm): 410

Disc Diameter (mm): 410

2008-2013 Audi A4 B8 Allroad 2

The best news is that there are significant gains across the entire rev range

The cast aluminum end boxes are optimized using CAD and CFD simulations to ensure ideal airflow and minimal back pressure

the compound is particularly suited to vehicles generating high aerodynamic downforce and operating under severe braking conditions

K&N E-3690 Round Air Filter 11"OD,9-1/4"ID,6"H ymm_79 Disc Diameter (mm): 410Description K&N E 3690 Round Air Filter 11"OD,9 1 4"ID,6"H K&N washable, reusable High Flow Air Filters feature a layered, oiled cotton media designed to improve airflow and capture contaminants. These filters are engineered to provide an increase in horsepower and are intended to last for the entire lifespan of the vehicle. Each performance air filter is reusable and installs easily into the factory air box. K&N drop in replacement filters are