Here is a little flatter bolt head. If these go into production they will be finished even nicer. It will take 25 sets to go to production. The thru bolt will look similar but be of a much better design and made custom for this application. They will sell for about $995.00 for both front seats.
No splines to deal with. You can have a touring and sport or his and hers seatbacks and change them out in 5 minutes. And the seatback stays where you put it.
