unless the Z is a N/A(no offense N/A owners) or sitting still at a show. My WW looks almost identical to your design(even though it is an add-on) from the back with just with a few extra lines on each side(like you stated) and the section that goes under the exhaust. This is why I choose the WW over all the other body kits out there, because I felt that it kept the stock lines, but just enhanced them enough to set my Z apart from the crowd.