Originally Posted by thomsbrain

Don't have the measurements handy but Sparco has them on their website and as I recall I confirmed them as accurate before I installed the seat. I'll see if I can find a picture. The Large size will probably NOT fit in the S2000 unless you have a stripped interior. The Medium fits (though it has a big ass that won't drop down between most slider rails). The head restraints are attached with full-area backing plates across an extra thick portion of FRP. The body of the seat will bend before the attachment point if you lean heavily on the head restraints. Probably still not as safe as a fully molded design but I wanted the option to remove them for the street. As it happens, I find I can still drive okay on the street with them in place. It's actually when you're strapped into the six-point and HANS that you start wishing you could see better for reversing in/out of parking.