[Keith Seymore]

Originally Posted by aceaceca

I am having a hard time making out what these gizmos do. Are they raising up the differential mount point for the upper control arms?
We used to lower down the differential mount point for the lower control arms.

Same thing.

They are changing the Instant Center location of the rear suspension, and it's relationship to the center of gravity of the vehicle.

Raising the rear of the upper control arm and lowering the rear of the lower control arm both move the IC up and more rearward from the stock location, increasing the anti-squat during launch.

Most folks move the upper and try to make the lower horizontal, but I believe it is to make it easier to visualize the changes being made.

K