Quote:
Originally Posted by axis
Ok, it's no suprise that all the aftermarket filters flow better than the stock one. The question is, has ANYONE, outside of manufacturer claims, showed a increase in HP from ANY of these filters? Having the ability to flow more is vastly different than actually doing it.
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This may not be a good example, but I have come across this before:
http://www.lsxtv.com/tech-stories/en...ntake-options/
They show an 8.4hp & 8.0ft lb tq gain from just a K&N drop in filter on an L99 car. Not sure how creditable it is though. Plus the test was done with the hood up.