Want to pick up some more horsepower and better airflow in your Audi A3/S3, TT/TTS, or Volkswagen Golf/GTI/R? Check out the K&N 57i Series Air Intake System 57S-9503 to improve HP and airflow over the OEM airbox.

K&N 57i Generation II Induction Kits are built primarily for European vehicles. They come with K&N's Million Mile Limited Warranty™. These intake kits use only non-metallic rotationally molded tubes that can reduce air temperature and decrease intake sound over a metal tube. Restriction can exist BETWEEN an air filter and the engine reducing the benefit of a K&N Air Filter alone. The weakest link in the airflow chain robs a vehicle of its natural horsepower. Often that weak point is the factory air path leading to the engine. K&N Air Intake Kits virtually eliminate air path restriction by replacing the air filter and the entire air path to the engine. The aerodynamically engineered tube drives a massive amount of air into an engine, which translates into POWER.

Note: 57i Intakes are not legal for use in California and other US States adopting California emission standards.

SAI Info:

If your car has this hose connected to the airbox please add the optional SAI Breather.