The factory dash panel is NOT the same height on the left & right sides, it tapers. I don't know about the Redline, but it's strange that they won't tell you.
The redline one does have a taper in it. I thought mine was messed up when I was doing some measuring on it. I didn't know the factory one had that 1/4" or so difference between the sides until after I saw it on the Redline one.