Well yes and no. Technicaly you should only have a fully stock car for import. Eg. If you have a cat back like me, you pull it of and swap it and mags if you have them too.
I will be VERY intersted to see if that wing passes at Vic Roads. Compliance will be fine, it's a factory kit as mine is. The only issue as I found is some pricks at Vic Roads think it's thier job to decide if a car's wing is road worthy or not. Thier job is ONLY to inspect the vehical's engine number, chaiss number and compliance plates to make sure it's all ok but some who know a little more about cars seem to think its thier job to check compliance parts like fuel restrictor, mirrors, tyres and wings.
When I registerd my car last week the guy was trying to tell me that my wing was "A little sharp" and seem to "Stick out a long way". After much fluster it turned out to be fine much to his dissapointment. See how you go huh!