" The K&N 57S-9501 performance airbox was aerodynamically designed to increase airflow and reduce turbulence , and provides up to three times the power compared to a K&N replacement air filter alone. K&N 57S Air Boxes completely replace the factory air filter housing with a high flow air filter fully enclosed by an aerodynamic air box. The design reduces restriction and provides more power. The airbox has a removable lid for air filter servicing. A custom engineered velocity stack also helps to smooth and straighten airflow for added horsepower. Installation is simple with K&N's detailed installation instructions . Fits VW & Audi 2.0L TSI/TFSI and 2.0L TDI engines. Applications include: 2005-on VW Jetta Mk5 2.0TDI 2009-on VW Jetta GLI Mk5 2.0L TFSI 2006-09 VW Rabbit Mk5 2.0TDI 2006-09 VW GTI Mk5 2.0L TFSI 2010-on VW Golf Mk6 2.0TDI 2010-on VW GTI Mk6 2.0L TFSI 2009-on VW Eos 2.0L TFSI 2009-on VW Passat 2.0L TFSI 2009-on VW CC 2.0L TFSI 2007-on VW Tiguan 2.0L TFSI 2009-on Audi A3 2.0L TFSI 2010-on Audi A3 2.0TDI 2009-on Audi TT 2.0L TFSI "