K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter Drivetrain>Clutch Rebuild Kits For years of durability and

For years of durability and great looks

This muffler features a 4" fully polished tip

The BladeRunner Transmission Oil Cooler kit makes installation simple with plug-and-play transmission line adaptors

quicker acceleration

K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter Drivetrain>Clutch Rebuild Kits For years of durability andK&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