K&N 57i cold air intake kit 57-0593. Audi a4 b6
 

Brand new in box
$125

Designed to Increase HP and Acceleration
Engineered to Specific Vehicle Design
Easy to Install, Usually in 90 minutes or less!
Lasts up to 100,000 Miles Before Service is Required (depending on driving conditions)
Million Mile Limited Warranty
Replaces OEM Filter and Air Box
Air Filter is Washable and Reusable
Works with Original Equipment Manufacturer Computer Systems
Street legal in most states (not street legal in CA – Check part number or vehicle listing for specific CARB status)
HORSEPOWER YOU CAN FEEL
As with all our kits, when you bolt-on a 57i intake, you will notice the difference the next time you drive your vehicle. Our 57i Gen I Intake Kits are a great way and in many cases the only way to maximize airflow and engine performance. They will replace the factory air box providing both High-Flow air filter technology and a larger air filter size. This winning combination will increase horsepower and sound great too.