I have a G35 and I was wanting to get a k&n intake system for it. However i have heard from people that it doesn't give you any power and its useless while others say you can feel the power! does anyone have an intake installed and if so, what were the results??

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Miro - such easy money www.unrealdiscoveries.com

The bottom line is that you should stick with the stock setup. To find out why, read this article (make sure you check the 4 links at the bottom of the article):

http://www.bobistheoilguy.com/airfilter/airtest1.htm