To convert a standard beam to a 6 degree beam you need to move the inner mounting points forward, like Ford did using the special brackets on the RS500. The brackets on the RS500 move the inner mounting point 90 mm forwards, which makes the beam something between 8 and 9 degrees. To make the beam 6 degrees the mounting point must be moved almost 11 cm to the front.

If you look at pictures from the Turbosystems beam you can still see the old mounting points. If you look at the distance between the old and new mounting points and compare it to the size of the bolt hole (M12), I don't think the distance is much more than 34 to 40 mm. And moving the mounting point forward by 35 to 40 mm would make it more like a 13 or 14 degree beam.