look at where these aftermarket get there fresh air from the same place the stock box does.they may help a little on the street but at the strip there no good cause your taking off the filter anyway.
we done test with stock04 with k-n aem and others
and at the strip with filter off there all running about the same.infact the stock air box is better cause we can fill it with ice up to the inlet hole and with the others u cant and we ran .15 hundredths quicker with the stock box filled with ice
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