Yes, go for it! Here's a link for installation instructions: http://www.the355.com/mambo/content/view/34/29/ One other thing I did do was put several layers of blue tape around the perimeter at the bumper and fenders before starting for protection just in case.
Another little tip is to make sure all the studs threads are clean. Some of these challenge grills have mucked up threads. Nothing like getting the install 3/4 of the way and have to pull it off because the thread on one of the studs is not clean.
Repo 355 CH grills are being made in the UK. I don't know who good they are but they are pre order on ebay item 300438148450 may be worth a look.
Yes! Check the threads! I forgot about that. Good advice. I think they end up getting powder coated and the mounting points will start to twist! I had to chase the threads with a die to make mine work.