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K&N 33-2181 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   40 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 Amount1.21 oz (36 ml)
Height1.25 in (32 mm)
Outside Length13.688 in (348 mm)
Outside Width5.188 in (132 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height17.19 in (437 mm)
Product Box Length8.31 in (211 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight0.9 lb (0.4 kg)

K&N 33-2181 Air Filter Product Reviews

Monday, August 8, 2016 - Part 33-2181
Perfect as always. The Benz runs much better with improved performance after installing these two filters. Every vehicle I own; car, motorcycle, and even my lawnmower are K&N equipped. I wouldn't have it any other way; 59 Jaguar MKII 98 Jaguar XK8 10 Mercedes Benz 05 Triumph T100 07 Suzuki S40 05 Husqvarna Truly a filter for every application

Rick Hansgen
Farmington, New Mexico
Wednesday, August 3, 2016 - Part 33-2181
Excellent service and delivery. A great product. Immediate difference evident in the performance and sound of the engine with the optimised air filters. Will definately be updating the air filters on my daily vehicle with K&N. Keep up the awesome work guys!

Alexey Stokes
Tamworth, United Kingdom
Monday, August 1, 2016 - Part 33-2181
I have been purchasing K&N filters and air intakes for various cars and motorcycles for over 30 years now. They are easy to install, and performance gains are noticeable. I have been happy with every purchase. Currently, I own 8 cars and 1 motorcycle. All are equipped with K&N air filters. Three of the vehicles have air intakes installed. Any new vehicles I purchase in the future will also get the K&N treatment. Great product

Paul Vingan
Schaumburg, Illinois
Wednesday, July 27, 2016 - Part 33-2181
Perfect replacement part, and it works perfect.

Steve Holland
Faversham, Kent, United Kingdom
Tuesday, July 5, 2016 - Part 33-2181
Happy with them but can't hear or feel any performance enhancement.

John Howden
Prestbury, United Kingdom
Saturday, July 2, 2016 - Part 33-2181
Fits perfectly in my Peugeot 208 1,2 PureTech 110 2016. In over 40 years I have fitted my cars with K&N Filters ( MG V8,Rover Vitesse,Citroen,Peugeot)

Mathes A.
Luxembourg, Europe
Thursday, May 26, 2016 - Part 33-2181
Great product, fits as good as original, no problems with a much cleaner pulling engine.

Ian Bailey
Isle of Wight, United Kingdom