The shock mount relocation bracket has the following benefits;
Lets the rear axle extend 35mm further,
The standard bolt into the axle seizes in place and needs an oxy torch to free it, whereas This gadget has a bolt and nut for easy on & off of the shock,
The mount allows sideways movement, so less binding/friction with suspension twisting.
You can also fit spring spacers at the same time so you get more hieght and still have the same drop :-)