I have a documented change where there was a noticeable difference in the stock intake and my CAI.

I understand many people think they gained power, or feel they have gained power, but that's not gaining power. Two filters sucking air from the engine bay will not give you any performance gain, it makes it slower.

I had a dual filter set-up with a V8 air box on previously and lost a ton of noticeable power.

As far as the part cost, it was well over $75.

The filter and couplers alone cost more then that. If people all sold products for cost we'd be communists.

Do you want to be a communist?