It is rear bumper extension for Audi A4 8H Cabrio / Convertible ( models 2003-2005 so before facelift models with new grill, however rear bumper in both models pre facelift and facelift are the same, SO these items will fit to any cabrio 2003 - to present models )

Extension is fitted directly on your existing bumpers. Should be glued and bolted on both ends. Comes with fitting kit.

Rear bumper extension will look pretty nice with rest of this kit, and on it's own too.