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33-2945
$52.99 USD
MSRP $81.99 35.4% Off
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K&N 33-2945 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   10 Customer Reviews
  • 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®
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 the majority of vehicles 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 K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.15 oz (34 ml)
Height1.563 in (40 mm)
Outside Length12.625 in (321 mm)
Outside Width5 in (127 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height13.56 in (345 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight1.3 lb (0.6 kg)

K&N 33-2945 Air Filter Product Reviews

Sunday, June 19, 2016 - Part 33-2945
This is by far the best airfilter for an Audi A4. Had it since the first delivery of the car and it is a fantastic filter. Not only filters but it makes the engine run smoother and the mileage per liter improves dramatically. An excelent filter.

Vance H. Nooitrust
Amsterdam, The Netherlands
Monday, May 16, 2016 - Part 33-2945
Feels like original.

Francisco Valdes
Mexico City, Texas
Monday, March 14, 2016 - Part 33-2945
Great product.

Ron Rutzinski
Sussex, Wisconsin
Wednesday, December 30, 2015 - Part 33-2945
Love it, have always been a K&N fan. Thanks.

Guy Slaymaker
New Jersey
Wednesday, November 18, 2015 - Part 33-2945
Instant low end power boost and a throaty sound for my Audi A5 2.0T; I recommend this air filter.

Joe Galdo
Jackson, New Jersey
Tuesday, October 6, 2015 - Part 33-2945
I use K&N in everything I own, three Harley motorcycles and three Audi cars. The improved air flow rate instantly gives a kick where you really need it, acceleration

Joe Galdo
New Jersey
Tuesday, September 1, 2015 - Part 33-2945
What a noticeable difference once installed, thanks K&N

Byron
Georgia