Really? I sat inside one and thought it was less lolNone, you actually gain abit
I was thinking that the glass/hardware and liner would make it less then a standard roof.The outside roof height is the same. The glass is thinner then a standard roof with installation and headliner. How could it be less? That assumes you are sitting under the sunroof. That thing is so big, unless you are in the back seat it is hard not to be under it.