I died laughing when I saw this...and so with a little research I can up with the same parts and pieces that you can make your own.
First go to your hobby shop and purchase a "ducted fan motor" that will run on twelve volts.
Ducted fan motors are what power R/C model jet air planes.
Mount the motor inside the tubing of your choice and then to your intake system.
Wire said motor with a (fused) deadman switch to your battery, and then purchase a low restriction cone filter and mate it to your tubing. The one pictured is the small filter. I think Spectre wants 20 bucks for 'em.
You have now replicated for about half the cost, the system listed for sale.
Let us know how that works for ya...
But seriously...if something looks too good to be true, it probably is.