Hello, has anyone installed a zender body kit (aerodynamics package) rear apron before ? What is the best way to attach it to the normal non-m bumper ? The bumper seems to already have a small extension that i don't see on cars with the zender addon.
Here you can see the normal extension (that i believe is a solid part of the bumper)
BMW_E39_rear_20071019.jpg
And here is a bumper with the zender body kit
FolsXtkDPpe6s7S1pvL8xgAI7iA-960.jpg