K&N Air Filter Project Clean-up Review

dirty K&N FilterI know most of you already probably use a K&N Filter in your special car. For those of you who don’t let me tell you what they are. These are relatively expensive reusable high performance air filters.

You can purchase a factory replacement for your car or a custom forced air system.

I have been using K&N Filters for decades. I have not done scientific tests on them to seem how much performance they add but I have read the magazines that have. I can tell you from a seat of the pants feel they work. Are they worth the additional price? That is entirely up to you. If you plan on putting a lot of miles on your car, they certainly are. If you only put a couple of thousand miles on it and don’t care about performance then the answer is most likely no.

However, one thing to keep in mind is that a standard air filter is never better than the first day you install it. From that time forward it is getting dirty. The more dirty it gets the less air it will flow. When it is visibly dirty and ready to change it has already cost you HP and MPG.



One advantage of a K&N Filter is that you can clean it yourself. You can do it as often as you like and keep it as clean as you like to maximize HP and MPG. How difficult is it to clean? Funny you should ask….I’m going to show you.

After you have removed the filter from your collector car or your daily driver, spray it down with K&N’s special cleaner and let it sit per the directions on the can. Once the cleaner has had a chance to soak in take it over to your shop sink (Do Not take it into the kitchen, you sweety will kill you!) and rinse it under the tap with clean water from the inside out.


If you waited as long as I did between cleanings you will see a surprising amount of dirt and specs flow down your drain. This is the mess your sweety does not want in her sink. Now set it someplace to dry. It was a warm day so I put mine on an old wheel out in the sun.


Once it is completely dry, spray it with the special red K&N Filter Oil. Spray one rib of the air filter at a time until the entire element is done. Let it sit for 10 minutes and see if there are any spots you missed. If so touch them up but do not spray an excessive amount of oil on the filter it may cause problems with any electronic sensors you might have on your computer controlled vehicle. img_9108

Now that you have that step complete all you need to do is reinstall the filter and drive off into the sunset knowing your engine is breathing easy.

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