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33-2021
$47.99 USD
MSRP $74.99 36.0% Off
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K&N 33-2021 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.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.76 oz (22 ml)
FlangesNone
Height1.25 in (32 mm)
Inner WireNo
Outside Length9.813 in (249 mm)
Outside Width6.125 in (156 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height9.69 in (246 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StyleUnique Air Filters
Top StyleOpen
Weight1 lb (0.5 kg)

Customer Feedback

Be the first to review part 33-2021
Very happy with how this adaption to my 2005 Honda Civic increases power with no noise. Easy to install, took me two hours because it's more difficult to dissemble the original part in my car in order to install this one. Just what the doctor recommend for me.

Oscar
York, Pennsylvania
I have K&N filters in all my vehicles; honda civic, mazda miata, honda cb 900 bike and honda cb1300 bike. I totally recommend your product.

Barry James
Queensland, Australia
Bought this air filter at the store yesterday and put it in. I can definitely tell a difference, not an amazing cold air intake difference but there is definitely a noticeable difference. I test drove around quite a bit and really liked the difference. 5 stars, and by the way I put this into a 2004 Honda Civic EX 1.7l

Colin Hartigan
Placerville, California