friction grade

What is the friction grade for the most recommended E39 brake pads (e.g., EE, FF, GG) EDIT: I called some BMW dealers to find out that the Jurid pads are FF. EDIT: Updated Textar (rears) friction grade as per Fudman to FF. EDIT: Updated Axxis/PBR ULT friction grade as per CalvinH to FF. EDIT...