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K&N 33-2091-1 Air Filter

Replacement Filters > Replacement Air Filter
  • 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.

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Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.31 oz (39 ml)
Height0.938 in (24 mm)
Outside Length10.938 in (278 mm)
Outside Width7.125 in (181 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
Weight1.1 lb (0.5 kg)

Customer Feedback

I bought a 2006 Nissan Quest 3.5S Special Edition in Feb.  Because the Van has a computer to calculate the average mpg, it changed my driving habit.  The Average MPG for the first 1880 miles, 20.8 mpg, was recorded by on-board computer.  After installed K&N filter and reset the computer by disconnecting battery ground line of the Quest VAN for 15 minutes, then reconnect, and drive for another 900 miles, my on-board computer shows average 23.3 mpg.  With the same driving style and commuting route, improvement is 12%.  I had traded in my 1995 Quest for this van and the 1995 Van's average mpg was raised from 19.5 to 20.5 mpg after using K&N filter as reported on October 26 2005.

Peter Gao
Austin, Texas
I have a 95 Nissan Quest V6 3.0. It had been giving out steady mileage of 19.5 with highway and local combined commuting. After I installed K&N air filter last year, I can get average 20.5 miles per gallon and repeatable tanks after tanks of gas driving under the same traffic condition as before. Also the van shifts more smoothly and became more responsive to the gas pedal. Thanks for such a good product.

Peter Gao
Austin Texas
I am very happy with the K&N Filter for my 1999 Nissan Quest. Performance improved especially with the A/C in use. The engine revs higher without as much leveling off at higher revs. Understand that high revs for a Quest is over 3,000 rpm.
I am a repeat customer. I purchased your filters and used them on my 1969 OSSA Stilletto and 1970 CZ 250. Those bikes were new when I bought your filters. I am happy that you have expanded and succeeded over these years.

Jeff Gibbons
North Andover Massachusetts