A couple of things, If you had a set of moon roof you get extra 3 inches of head room. Some people me included have C5 and C6 seats. To make them work, for tall people, they usually remove all the power stuff and bolt them directly to the floor in a fixed position.
I am 5'9" and do not have that problem and also my car is a convertible so I get a little extra headroom there. They sit about 3 - 4 inches higher than the stock C3 seats with all the power stuff installed.
Check out my profile picture to see my seats.
Last edited by Frank_nesta; 12-09-2012 at 10:41 PM.