There is some theoretical basis for this thing working, as far fetched as it may sound. The vortex doesn't have to continue all the way down the intake to have an affect. All it needs to do is increase the pressure (decrease the pressure drop) along the intake. The increased pressure will cascade down into the cylinder whether the vortex extends that far or not.

However, I'm not convinced the thing increases the pressure at all. If anything it adds an additional pressure drop.

Also, I'd be worried that the flimsy tin contraption could fall apart and send shrapnel down the intake wiping out the MAF and jamming up the valves.

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