Originally Posted by V1H

Does anybody have some insight?

I've been reading much about getting a finned NISMO diff cover for my TT conversion. So I had a look under my UKDM 370Z GT Edition M/T.
It was built April 2013, hence MY12.

As you can see, mine has a finned stock diff housing.. How come? When was this introduced by Nissan.. and does it mean I can skip the Nismo diff cover mod? On google I cannot find any 370Z resembling my underside