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K&N 33-2125 5.0 out of 5 stars 3 Customer Reviews
Replacement Filters > Replacement Air Filter

 List Price: $77.21
Your Price: $52.99

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K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for virtually every vehicle on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED. [More Information on Replacement Air Filters]
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
Available Information
33-2125 Cross Reference
Installation Instruction Sheet
33-2125 Vehicle Applications
Air Filter Test Data
News Story - Simple Volkswagen Passat Performance Additions
News Story - Performance Upgrades for the Audi A4 Quattro Protect Your Engine

Part 33-2125 Product Specifications
Product Style: Panel Air Filter
Height: 0.75 in (19 mm)
Outside Length: 9.875 in (251 mm)
Outside Width: 8.25 in (210 mm)
Air Filter Shape: Panel
Filter Material: Cotton Gauze
Package Contents: 1 Air Filter
Package Quantity: 1
Filter Re-Oiling Amount: 1.32 oz (39 ml)
Inner Wire: No
Top Style: Open
Weight: 1.1 lb (0.5 kg)
Product Box Length: 10.44 in (265 mm)
Product Box Width: 1.75 in (44 mm)
Product Box Height: 11.56 in (294 mm)

Product Reviews      Review part 33-2125

 It fits perfect on my Passat.
Ioannis Kaldelis, Athens Neo Iraklio, Greece
 Fifth vehicle equipped with K&N filter. No Complaints. Just perfect.
Stéfan, France
 Get about 4mpg better now and the twin Tunis love it! 2.7t Only filter I will ever run on my Audi.
Colby, Kuna, Idaho