I’m having issues importing this mesh in UE4. No matter what I do the normals are messed up.
This is the mesh in blender:
This is unreal (mesh normals displayed correctly but inverted):

here in unreal if I flip the normals in blender (faces are the right way but the normals are completely messed up):
Here is the file:
https://drive.google.com/open?id=1mI9rMnN9vTpReoGubySZBPN0o5QKrc_0