I just trying to really understand why people feel they are getting more HP from aftermarket part?
How would you feel if I told you that Stillen did not do any R&D and they just took some pips and filters and design them in such a way to lean out your eng to run richer so on a dyno you see more HP? you feel pissed off right? or would you still buy it because you think in your head that if you are putting an aftermarket part on your car that it's got to be better design and NISSAN is just holding out on HP.
If you go and talk to MINES of Japan or Amuse Powerhouse! they always run stock air box with there tunes and setups!
As you can see they run stock air box with RAM Air!