I've installed. The piece is almost a work of art. Honestly it's beautifully manufactured. Kind of a shame to hide it inside the bowels of the car.
I don't think it offers a performance improvement as much as it offers a reduction in the loss of performance. As in when it's hot outside and you're running hard, your car won't heatsoke near as badly compared to the stock unit.
Last edited by robertm; 10-08-2012 at 08:50 AM.