I've had one for years and no issues. Just oil it correctly. Also, watch engineering explained video on it and it does add some power. Not much. And I don't have any mpg gains.
I would recommend a K&N cloth filter. They can be cleaned and re-oiled about every 50K miles. They never need to be replaced.
I run K&N's on my Harley and the blower on my SBC. No issues.
I replaced the air filter with a higher quality paper k&n, but thats it for anything under the hood.
a k&n air filter, it changes the car a fair bit and gives it some new life too
k&n drop in air filter because why not.
The K&N have cleaning kits for there's with an oil you reapply, but the steps take time for it to dry
Reusable K&N filters very marginally improve performance at the cost of allowing more dust and other particles into your engine. OEM paper filters or other reputable ones like WIX do a much better job of actually cleaning the air.
The k&n gets you nothing except for letting a lot of dirt through if you don’t oil it regularly.
K&N air filter is rated as the worst thing you can put on your vehicle. We tested different 'cold' air intakes when I went to Nascar Tech and K&N will take away around 8 horsepower.
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