K&N® 57S-9501 - 57S Performance Airbox

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K&N Air Intake Systems

57S Performance Airbox (57S-9501) by K&N®. This airbox has a stock appearing design and function, but will still greatly increase airflow. The increased airflow comes from a large conical shaped K&N air filter, and results in more horsepower and torque from the engine, and greater acceleration you can feel. Replacement Filter # RU-5061.

Notes: Not legal for sale or use in California.

K&N - F.A.Q.K&N - Warranty


  • Guaranteed to increase horsepower and improve acceleration
  • Custom designed and engineered for each application
  • Works with OEM computer system
  • Mounts in place of the OEM airbox
  • Reduces induction noise
  • Includes the world's best air filter, the K&N filter
  • Easy to install
  • Street legal in most States
  • Up to 100,000 miles between servicing
  • Million Mile limited warranty

The 57S Performance Airbox gives you the best of both worlds: Increased airflow and performance with an OEM style airbox. With the filter enclosed in an airbox, induction noise is greatly reduced. The airbox also protects the filter, so there's no need to worry about driving in extremely wet or dusty conditions with an exposed filter. Yet you still get vastly improved airflow compared to your stock airbox. How do they do it?

K&N improves airflow by installing the largest conical shaped K&N filter that will fit in the airbox. The large increase in filter area over the stock air box filter results in a huge increase in airflow as well as a greater capacity to capture and hold dirt. The airbox also includes a custom engineered velocity stack that’s designed to smooth and straighten airflow for even more power.

The 57S Performance Airbox is injection molded for extra strength, consistency and durability. It's designed to use the factory mounting holes, so no additional hardware, cutting or drilling is required. The air box has a removable lid for easy access to the K&N air filter when cleaning is required.

K&N uses a dynamometer to design its air intake kits to make the most horsepower possible. But their power figures aren't based on just one vehicle, but rather an average of runs by a number of vehicles. This means repeatable numbers and horsepower claims you can count on.

Every 57S Performance Airbox comes complete with everything necessary for installation, including comprehensive installation instructions. The K&N filter can go up to 100,000 miles before cleaning is required. And the K&N air filter is guaranteed for one million miles.

K&N® is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. The first K&N filter was conceived for racing over 40 years ago and a performance enthusiast mindset continues today throughout all levels of the company. K&N is the sales and brand leader for performance filters, including an extensive line of factory replacement filters and performance air intake kits. The company actively promotes the environmental, economical and performance advantages of long-life reusable cotton gauze filters.

Part Number:

Vehicle Fitment

This part is compatible with 35 vehicle(s)
Year Make Model Fitment Notes:
2015 Audi TT
  • 2.0L
2015 Volkswagen CC
  • 2.0L
2015 Volkswagen Tiguan
2014 Audi TT
  • 2.0L
2014 Seat Altea XL
2014 Volkswagen CC
  • 2.0L
2014 Volkswagen Tiguan
2013 Audi TT
  • 2.0L
2013 Seat Altea XL
2013 Volkswagen Beetle
  • 2.0L
2013 Volkswagen CC
  • 2.0L
2013 Volkswagen Tiguan
2012 Audi TT
  • 2.0L
2012 Seat Altea XL
2012 Seat Leon
  • FR
2012 Volkswagen Beetle
  • 2.0L
2012 Volkswagen Passat CC
  • 2.0L
2012 Volkswagen Tiguan
2011 Audi TT
  • 2.0L
2011 Seat Altea XL
2011 Seat Leon
  • 1.8L
2011 Seat Leon
  • FR
2011 Volkswagen Beetle
  • 2.0L
2011 Volkswagen Passat CC
  • 2.0L
2011 Volkswagen Tiguan
2010 Audi A3
  • 2.0L
2010 Seat Altea XL
2010 Seat Leon
  • FR / Style
2010 Volkswagen Eos
2010 Volkswagen Jetta
  • 1.9L
2010 Volkswagen Passat
  • 2.0L
2010 Volkswagen Tiguan
2009 Audi A3
  • 2.0L
2009 Seat Leon
  • 1.8L / 2.0L
2009 Volkswagen Passat
  • 2.0L
2009 Volkswagen Tiguan
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K&N® - 57S Performance AirboxK&N® 57S-9501 - 57S Performance Airbox    $251.99
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