I will be cutting the flanges between the cylinders to allow for the pipes to move
I also have an electrical furnace i will be putting the manifold into to normalise it after its all been welded.
I appreciate your coments about the pipes but the picture makes them look closer than they are , i also have had used this thermal coating before and i know how effective it is , if this was not good enough i would simply wrap the pipes in tape , though this would be a pain