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Hey guys and girls, I have a question for you. Does anyone just use a K&N replacement air filter with the stock airbox? If you do then do you notice better gas mileage? Also since K&N's were made to flow more air that means that they probably filter out less dirt than paper filters, has anyone here that has used a K&N looked at their throttle body and found a build up of dirt? thanks.

 
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A lot of the filtering ability for K&Ns come from the oil used on the gauze filter material. A lot of smaller particles will get stuck on the oil than on a dry K&N filter.
I personally have not heard of anyone using a quality reusable air filter that has had such problems, if they follow the proper cleaning and oiling procedure.
If there were any major problems I'm positive we would know, since there are millions of them out there.

 
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K&N doesn't filter and it doesn't give any worthwhile horsepower. Just get a paper napa Gold air filter.

 
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I beg to differ... I replaced the stock airbox filter with a k&n, and installed a short ram intake. Definetly a noticeable ride difference. Quicker responce, slightly better mileage.

 
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Um... wait. You replaced the stock air filter and had a sri at the same time?

 
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I custom built a pipe, directly off the original air filter, where resonator was, acting in a way like cai but without the filter at the end. *Less moisture, and still cooler air quicker. Call it what you want...not by definetion a short ram i am aware...

 
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haha i used to have the same setup. K&N airbox filter with custom pipe. however that sucked so i just bought the FIPKII short ram...

check pics in my gallery.

 
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You changed the entire intake... not just the filter.... I sure hope you would see some gains.

All he asked about was putting a K&N in the stock airbox.

 
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I did, looks dope. SO how does this compare? Why would you say our setup sucks?

Ah yes, this is true. Asian: the filter alone was slightly noticeable, just a quicker respose to acceleration. I drove a couple days with filter on, but without my pipe.