LBZ Air Intake, Stock or Not?

[Petrella]

Ive been hearing from a lot of people that it is a waste of money to install an aftermarket intake system on the LBZ. Most people say just throw in a K&N or Airraid filter, and its just as good as any aftermarket intake system. Whats everyones opinion on this? any numbers to show this is true?

Anthony
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2006 GMC Sierra 4x4 CC SB SLT LBZ/6 Speed
Dark Pewter Leather and Power Sunroof
305 70R/16 tires on Eagle 16x10 rims
Chrome wire mesh grille
Alpine Stereo, Navigation, and flip down rear screen
Autometer Cobalt gauges
Mag-Hytec Diff cover
pics of my truck -http://www.picturetrail.com/gallery/view?p=999&gid=12647120&uid=2685617&members=1

[MillCreekDMAX]

I use an AFE stage II intake and i like it just fine. I havn't taken it to the dyno to see if i actually gained anything but a hole in my wallet. Dont really care though. I like the sound better. I imagine i gained a little something because the intake tube is smooth rather than ribbed, but probably not that much. Otherwise i am pleased with my purchase.