The QA1 LCA’s don’t really change anything with regard to the wheel rate, no. The pivot location, length and ball joint locations are all the same. The profile height is different because of the construction of the LCA, and before QA1 added bump stops to their LCA’s that meant the QA1 LCA would give about 1” of extra suspension travel between the frame and the LCA. Which is handy if you’ve lowered your car. Their new design added a bump stop, and made the profile height about the same as the stock LCA’s. I have the older style on my car, so even though my car is lowered pretty substantially it has the same suspension travel as a car at stock ride height using stock bump stops.
