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Originally Posted by V6MustangFTW
Had to google that one... never knew thats what those bumpers were called  looks like I could get the oem covers for cheap, but I think I can get creative with some sheetmetal and rivets for free since I already have those laying around. 
Also, what do the aero experts here think of that lower lip? Can I take it off, or maybe replace it with something with a bit more clearance? It was already broken and zip tied together when I got the car and it keeps scraping on certain driveways because of how low the car sits. |
I suspect that what is there was 'optimized' in VW's wind tunnel.
It's thermoplastic, and body shops have hot-air welders which could fuse the fractures back together. I used a low-power soldering iron to repair my friend's Prius front fascia which was in far worse condition than your Jetta's.
I don't know what's behind those openings. If you believe that your at no risk of cooking something, then blocking them closed has been demonstrated as a drag reduction technique so many times now, it would be a shoe-in for modification.
