Whoa gang - back the lynch mob up a bit. I NEVER have and NEVER will call anyone a condescending name, or insinuated someone is not as smart as I - where'd you get that?
If you think about the principle of this thing, it's much like carb spacers on the older engines which were used to aid upper RPM performance at the expense of low end but with the "marketing twist" of the special "Helix Bore". This special bore to "swirl" the air - how will that work? You actually want a SMOOTH air flow up until the point the air mixes with the fuel. Why do you think people spend so much time POLISHING intake runners and plenums? Chrysler has developed "hi-swirl" HEADS in years past for the 2.2/2.5 & the 318/360 engines. The "swirl" action is in the head AFTER the air has mixed with the fuel and actually, on the 318 head, it's not done until the A/F mixture enters the combustion chamber. Instead of designing new heads, would it have not been cheaper to simply add this spacer?
"Increased combustion efficiency..." ; well that equates to better fuel mileage and if that were so, with all the pressure the Govt is putting on auto makers to maximize fuel efficiency, don't you think the Big 3 would have incorporated this in they're design? Who has more R&D $$ to research products to increase "combustion efficiency", Ford, GM & ChryCo OR Airaid Inc?
Once again, I have only stated my opinion of this product and have made no personal attack on ANYONE.