It's not really stated in the S2000 wiki but I'm guessing the seat rails changed in 06 when the head rest went solid. Yes? No? Maybe so? I much prefer the solid headrest and would like to "upgrade" if at all possible.

 

well.. the new design it's more safty if a person hit the car hard, so neck won't crack lolzzz...

 

forgot to tell...about the seatyrails.

the seatrails it's disign to have an extra sensor , since it's a DBW system..