It's a scam.
Supposedly it should "spin" the air in the intake, "improving MPG and horsepower" (fools calim 15% increase in hp, LMAO).
What it really does is creating a restriction in your intake. Im willing to bet money that it will actually DECREASE power on a car, especially a turbocharged one like a Supra, where air flow is so important.
Another funny thing about it is that you're supposed to insert it into the accordian hose (in between the AFM and turbo). Now tell me, how the FUCK is it going to effect anything (assuming it DOES spin up the air) if the air is going to the turbo anyway where its going to get compressed and go through lots more piping and IC. Im sure that if you ask the seller this question, he's gonna say that the air keeps "spinning" after it leaves the turbo... all the way through IC.
The scammers these days...... sad.....