Your mesh is not smoothed correctly, make sure you export the FBX with smoothing groups!
http://puu.sh/tBnWH/5de73bd19a.jpg
There’s also the issue where your mesh is split in many different pieces and it’s causing the UVs to mess up. So I suggest you combine the mesh outside of UE4 and reimport. Double check your UVs afterward and make sure all your UVs are present in the first channel.
http://puu.sh/tBpyk/fbd9bc7675.jpg
Also make sure you use these import settings for normals:
http://puu.sh/tBoPy/f90a132d7a.png
Material:
http://puu.sh/tBptx/6f9d86087b.png
Final product: