HELP!!

Two weeks ago I replaced the stock struts and shock absorbers on my 2007 Xterra with the 4600 Bilsteins. I can now hear a knock coming from the front passenger side wheel well every time I go over a bump. There is no such sound coming from the driver side. I think this is a new sounds, or maybe its an old sound and I'm just hyper sensitive to it now.

Anyone have any idea what the sound might be coming from?