SEARCH BY VEHICLE
33-2125
$50.99 USD
MSRP $78.79 35.3% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N 33-2125 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   13 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®
The K&N 33-2125 Air Filter fits some Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, Audi Allroad Quattro, Audi RS4, Audi S4, Audi S6, Skoda Superb, and Volkswagen Passat models. See vehicle applications link for details.
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 Amount1.32 oz (39 ml)
Height0.75 in (19 mm)
Inner WireNo
Outside Length9.875 in (251 mm)
Outside Width8.25 in (210 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height11.56 in (294 mm)
Product Box Length10.44 in (265 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Top StyleOpen
Weight1.1 lb (0.5 kg)

K&N 33-2125 Air Filter Product Reviews

Wednesday, November 2, 2016 - Part 33-2125
Air filter arrived quickly, and is a great quality product. Very impressed with the service from K&N.

Philip Pearson
Bangor, Northern Ireland
Friday, October 28, 2016 - Part 33-2125
I can already feel the difference in acceleration.

Kellom Williams
New Orleans, Louisiana
Monday, October 24, 2016 - Part 33-2125
Perfect replacement filter for Audi A6 2.7 twin-turbo. The engine reacts faster and gets to full power quicker. I highly recommend this filter seeing that it does not cost more than the OEM Audi filter. Filter was ordered and received three days later.

Philippe Malagoli
Blainville, Canada
Monday, June 13, 2016 - Part 33-2125
Fantastic! What a difference. I will buy these until I die.

David Dow
Albuquerque, New Mexico
Monday, April 25, 2016 - Part 33-2125
Order shipped in a reasonable amount of time and arrived undamaged and on time. There is not much else to say about K&N products or services; they are simply outstanding.

Bane
Santa Rosa, California
Wednesday, January 6, 2016 - Part 33-2125
On our cars (Volkswagen / Audi 1.8T Motors) Upgraded air filters wont give us any more power then we already have. It's just a fact. But if you need an air filter why not get one that you don't have to replace every time and could just clean and re use? K&N is one of the best filters out there period. I'm a real person and wasn't paid to say this. I was going to get an (brand name) but they don't have the same guarantee as K&N. It also came a lot faster then I was expecting it to.

Ira
San Diego, California
Monday, November 9, 2015 - Part 33-2125
My third K&N filter, this one for my wife's Audi allroad. She noticed the difference right away.

Paul
Lafayette, Colorado