dohc-vtec_eg

As most rx7 driver know, we are limited to what fits in our car and waht does. I jsut wanted to see what other car/aftermarket seats fit in our cars. I was lookin at the sparco Speed seats and wanted to knwo if they would fit in my car or if anyone knew the diminsions for it.
http://www.sparcousa.com/pseats_street.asp?id=192

Can people put down some seats what seats fit our cars well. I heard something about our shoulder length can only be 21.5 inches. anything else is pushin it.