I’m pretty new to UE4 so maybe it is something really simple i’m missing in this case but i keep getting these color differences between seamless tileable objects.
I tried to use higher light maps, different matierals, playing around with settings but i can’t find a way to fix it.
It can be very difficult to fix that issue. In your case, either avoid constructing things that way, or you can actually just use a single mesh for each part and scale it to reach the length you need instead of making it out of multiple objects.
Try putting seams in places where there would be seams in real life, or hiding them. You can try putting another mesh or something on top of the seams as well.