just because its the same thinkness dosen't mean it flows the same or has the same cooling effect.
Also who here has seen a bad product out of Tomei? i know i've got Tomei products in my car, and they have never failed me.
also do you thinka company would make a product wich has the same cooling properties as stock and then have the balls to sell it at 1700. if they didn't get good results all they would get out of it, would be bad press.