4-POINT SEAT HARNESS

In the US, we cannot order the car with the 4 point seat harness (or roll cage!)
Has anyone installed them on race seats after market?
I was looking at the following page and it seems like the seat are not the same in the US:
http://ricambistica.nexisonline.it/ferrari/index.php?macchina=41&tavola=t121
Does anyone know what the differences are and if the US race seat are different enough from the other markets that installing a 4 point seat harness would not work?

 

this link will not open without a login id

 

I know, sorry about that; creating the logging was easy though.
I used Google Chrome to translate the page but it looks like you can probably just enter fake info in pretty all the fields and get login right away.

 

Maybe wrong, but isn't it critical to get roll bar with 4 point seating harness. Otherwise, in a roll, roof may collapse on driver held in by 4 point seating harness, thus resulting in driver being crushed.

 

I put them in my GTO after it came stateside. The belts came from Canada. I inquired about putting them on the 458 and was told I could. Hope that helps.

 

I asked my dealer and they said they could not order the belts. Was it your dealer that told you you could or someone else?