You sell auto parts?
I'll bet you sell lots of bullshit then. Like "tornados." Every auto parts store in existence seems to have them.
Customers DON'T HAVE A CLUE for the most part. That doesn't substantiate your claim. As for manufacturers not being able to hook up emissions to a "free flowing" intake, that's just more BS. What emissions is required? AT MOST a thermostatic switch. Period. And quite a few engines don't even have that.
So, keep digging yourself a hole. It's VERY clear you don't have the slightest clue what you are talking about.
That "2HP" BS (it's usually closer to 5HP) is claimed SPECIFICALLY because it's dang near impossible to measure even with a dyno. It's marketing.
Almostclueless, a "free flowing" intake isn't going to do anything UNLESS the throttle is mashed to the floor. The throttle is a FAR bigger restriction than any intake. And it also has to be revving quite high.