with standard TT seats ( but all options ) can I switch the back unit to the sports item easily without replacing the whole seat unit ? and if so do you know anybody who does this ?

 

http://www.lltek.com/porschtek/986_bxstr_seatmod.htm

 

Here you go. Check out this link. I did them last year. Got'em from a guy just north of miami. They look great and you get to keep your power and memory features.

https://www.6speedonline.com/forums/...threadid=13036

 

Apart from the looks are they significantly more comfortable, how are seat backs attached to the OEM items, is this reversible ?

 

They feel exactly the same. Unless you have the shoulders of hulk hogan, you can't even feel the wings. It's just for looks. As far as install, they screw into you seat backs. So no, they're not reversible. Well, they could be, but then you'd have to have the leather repaired. I belive they have the directions posted on the Lltech site.