See what I mean? all the naysayers do not have actual hands-on experience themselves. It all comes from what they read around here...all based on one person's flawed installation error.
All those with actual personal experience say the opposite.
There are not alot of guys I would trust with that kind of info. But, Naz is one I would trust. I haven't talked to him about it, but if it says it doesn't provide any gains, I'd believe him. I don't think anyone has gotten more out of a stock shorblock or a 4.6 based motor than he has. Plus, this is a cheap mod. I don't think anything is cheaper outside of a drop in K&N.
But, in general I agree with you. Too much hearsay.