Installed on M99 9-3, job was easier than I expected. I didn't need to use a u-joint to reach the four bolts. I did loosen the top two more than the recomended 7 turns to get the shims to fit around the park brake hardware. For a 9-3, you can skip steps 4, 7, and 8 in the instruction from the tech library.
With the shims was able to get my rear camber to -1 +/- 0.2, this should help a bunch with tire wear.
Great little product from GS!Rating: [5 of 5 Stars!]