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Replacement Air Filters, Aftermarket Air Filters, Drop-In Air Intake Filters at

A Drop In Replacement Air filter for your vehicle is the best option you have for replacing your stock air filter. Whether it be for performance needs or pure economic reasons, replacing your stock paper filter with an aftermarket K&N filter is hands down the smartest thing to do.

Your vehicle engine needs air. In order for the fuel in your car to combust properly and keep your motor running, the optimal amount of good clean air is necessary. Too little air and combustion cannot occur, leaving your car unable to perform. On the other hand, unrestricted air, full of particles and debris is also dangerous, and can block and damage vital engine orifices. Thus, a good air filter is needed to both keep out dirt and let the right amount of air flow into the engine.

Replacement Air Filters


General K&N Drop In Replacement Filter Installation Instructions

Unlike most components on cars today, changing your stock air filter is easy since, compared to other components in your vehicle, it is easy to get to.
  • Locate your vehicle's stock airbox.
  • Undo the metal clips on top to release the cap.
  • Open the stock air box and remove the old air filter.
  • If the K&N Replacement drop in filter came with K&N sealing grease (only certain applications will), apply it to the sides of the filter in order to create a better seal in the airbox. If the grease is unusable for any reason, you can use synthetic grease of white lithium. Do not use petroleum-based products instead of grease.
  • Drop in your K&N Filter into the stock air box
  • Replace the lid and re-fasten the clips
  • Enjoy the added power and filter life!

K&N Filter Cleaning Instructions

In order not to void the warranty, you must clean your K&N air filter with a K&N Recharger Service Kit every 50,000 miles.
  • Uninstall your K&N Air Filter
  • Find the bottle of air filter cleaner in the Recharger Service kit and spray both sides of the filter. Allow the filter cleaner to soak for 10 minutes, making sure cleaner does not dry up.
  • Rinse both sides of the air filter with low pressure cold water, making sure all dirt and filter cleaner residue is completely removed. If necessary, re-spray with filter cleaner and repeat the process until the filter is clean.
  • Shake off excess water and allow the filter to dry naturally. Do not use a heater or oven lamp.
  • For Squeeze Oil Recharger Service Kit Part #99-5050: Apply the Squeeze Oil from the Recharger Service Kit evenly along the fold of each pleat. Allow oil to sit for 20 minutes. Touch up any areas that are not uniformly red in color. For Aerosol Oil Recharger Service Kit Part #99-5000: Apply the oil from the Aerosol can in the Recharger Service Kit evenly on each pleat. Let sit for 20 minutes, and touch up any areas that are not uniformly red in color.
  • Make sure there is no excess cleaning oil on the filter. The filter should not be saturated to the point where oil is dripping from the filter. If so, remove the excess oil before re-installation.
  • Reinstall the cleaned K&N air filter into your vehicle's air box, and enjoy your renewed power and airflow.

K&N Replacement Air Filter FAQ

What's the problem with OEM air filters?

All vehicle manufactories in choosing their stock air filter, chose a paper filter design. While paper does an adequate job of filtration, it's rigid solid nature renders it susceptible to clogging relatively quickly. While replacing it with another paper air filter may be cheap, paper filters have to be replaced very often. K&N cotton drop in filters on the other hand are washable and reusable. If you were to JUST use OEM paper air filters, then over the life of your vehicle you would actually end up spending more than if you bought just one washable aftermarket K&N air filter and the appropriate amount of K&N cleaning kits.

Why are K&N Air Filters the best filter for my vehicle?

It's all about the design. K&N replacement air filters use a cotton filtration medium instead of the stock paper air filter. Cotton by nature is more fibrous than paper. That means instead of catching particles on the surface of the filter like paper does, it can also catch dust and other debris on the fibers before they even reach the surface of the filter. This process is helped by the fact that K&N uses a specially formulated oil on their cotton to catch and hold debris. As the fibers get dirtier, they actually help filter air even more since their surface area gets bigger, leading to better filtration overall.

Why should I trust K&N to decide what's best for my car?

K&N is the most well known motorsport aftermarket air filter manufacturer in the world. Whether it be stock car racing, go cart racing, or even watercraft racing, every racer knows and respects K&N. The founders of K&N were motorsport enthusiasts as well. K&N first developed their oiled cotton filters in the harsh and competitive world of desert motocross racing. By experimenting with new media, they were able to come up with their design which helped them to win race after race in the hot and dusty desert environment. If K&N's filter can reign supreme in the unforgiving world of desert dirt bikes, then you can be sure a K&N replacement air filter will work wonders in your car as well.

Are K&N Replacement Air Intake Filters street legal?

Yes! In addition to being a minimally intrusive upgrade (especially when compared to installing more involved products like cold air intakes) K&N specifically designs their drop in filters to be 50 state emissions compliant, meaning it is completely street legal in the entire United States. You can drive in peace knowing your vehicle will not only perform better, but still be legal as well.

How much power can I expect to gain in my vehicle with a K&N Drop-In Filter?

It is not guaranteed, since there are a variety of factors that can influence the amount of power you could gain with an air filter, but generally speaking, you can expect a gain of 1-4 horsepower.

Another filter company claims that their filter has filtration levels in the 99th percentile. Does that mean that their filter is better than K&N?

No! Filtration level is not the end-all deciding feature for air filters. There are many features that are important in choosing the right replacement air filter for your vehicle. Filtration efficiency is just one of them. There is also air flow while getting dirty, the amount of dirt the filter can hold, and the overall effective longevity of the filter. Basically, what's important is getting the RIGHT amount of clean air into your engine (more air than necessary will not make your car go faster), and how long that filter could do that efficiently. Higher filtration at the expense of air flow is counterproductive, just as higher airflow without filtration is also bad. K&N makes sure to balance all these factors in order to create the best possible filter for your vehicle.

Will a K&N replacement air filter damage my vehicle's mass air sensor?

No! There was a company that used to purchase filters from K&N for use with their cold air intakes. Later, they tried to cut out K&N filters and use their own filters instead. It was then that the unfounded rumor began that K&N Drop In Air Filters, which are lightly oiled, could lead to a damaged mass air sensor. The fairy tale claims that oil will migrate from the filter over time and get onto the mass air sensor, damaging it. First off, it has to be remembered that the engine bay of your vehicle is not a pristine surgically clean environment. There is oil, debris, liquids and all kinds of gunk everywhere. You know your engine bay is not an appropriate place to eat your dinner off of. As such, your vehicle's mass air sensor is used to getting small amounts of all this gunk on it all the time. What little oil that might find it's way to your sensor will not be enough to damage it. To prove this, K&N has created their K&N Customer Protection Pledge. If your dealer ever claims that your vehicle's mass air flow sensor was damaged by a K&N air filter being used properly, they will personally take control of the matter and make sure that your dealer honors their warranty. Rest assured, that to date, there has never been an actual documented case of a K&N Air Filter leading to a damaged mass air sensor.

What comes with a K&N drop-in replacement air filter?

For most applications, K&N replacement filters come with everything you need for installation, which in most cases, is just going to be the pre-oiled filter itself. For most applications, you don't need to do anything else outside of taking the filter out of the packaging in order for it to be ready for use. In some cases, a stock filter box might have been designed with fitment issues, in which case, the K&N filter will come with a little tube of grease to apply to the sides of the filter for a better seal.

How often do you have to clean a K&N Air Filter? Is it possible to clean my K&N Air Filter too much?

Your stock paper filter probably is rated to last 10-15,000 miles before it needs replacement. A K&N Filter though, does not need to be cleaned for 50,0000 miles (though you have to specifically use a K&N Filter Recharger Service Kit). Also, there is no such thing as cleaning your K&N filter too much. K&N has performed tests where they consecutively cleaned filters over 100 times and they still performed just as well.

How long is the warranty for my K&N drop in air filter?

K&N backs your filter with their industry leading Million Mile Warranty. Basically, if you properly clean your K&N Filter with K&N Recharger Kits every 50,000 miles, K&N guarantees that their filter will last the life of your vehicle. If it does fail with proper use, then K&N will replace the filter free of charge.


TunersDepot Replacement Air Filters Reviews & Ratings (11)

Our 11 Replacement Air Filters Reviews have an average rating of 4.9 out of 5 stars. Every customer can leave a review about our service and the product that was purchased. In order to leave your review for the purchased product, please log into MY ACCOUNT after you receive your order. We encourage all of our customers to take the time to share their experiences with our website with everyone.

K&N® Drop in Air Filter Replacement
Posted on Jul 19, 2013 by - (2009 - 2012 Acura TSX)
The K&N air filter performs as expected. Huge difference on the response for my Acura. Very pleased!!!
K&N® Drop in Air Filter Replacement
Posted on Jul 1, 2013 by - (2009 - 2011 Ford F-150)
Super fast shipping, good communication with TunersDepot! Will recommend all of my friends shop from you guys!!
K&N® Drop in Air Filter Replacement
Posted on Jun 17, 2013 by - (2006 - 2011 Honda Civic)
I got the filter very quickly it seemed. Installation was very easy with just removing the old one and putting this one in. This air filter is a must if your trying to decide which one to get.
K&N® Drop in Air Filter Replacement
Posted on May 31, 2013 by - (1993 - 1998 Lincoln Mark)
K&N filters rock - superb quality, ease of installation and always a good value. Last filter you'll ever install. Excellent product and I would recommend.
K&N® Drop in Air Filter Replacement
Posted on May 23, 2013 by - (1988 Chevrolet Corsica)
Arrived today in good condition. It took me some time to take the old one out and fit this new one in, will see its performance on my ride..
K&N® Drop in Air Filter Replacement
Posted on May 13, 2013 by - (2011 - 2013 Lexus CT200H)
Finally I decided to choose this air filter after comparing between several ones. The service of Tunersdepot staff impressed me most, and the air filter turns out to be a perfect fit!
K&N® Drop in Air Filter Replacement
Posted on Apr 5, 2013 by - (2008 - 2012 Subaru Forester)
Easy trasaction, good price for my filter and fast shipping!! Thank you!!
K&N® Drop in Air Filter Replacement
Posted on Feb 15, 2013 by - (1998 - 2004 Daewoo Matiz)
Fast shipment with correct item. I will back for more when I need.

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