Well, this is pretty simple. If you lower your car, the QA1 LCA’s allow almost an inch of additional suspension travel vs a stock LCA. So, you can directly lower your car a full inch without losing any suspension travel. That’s pretty important, as lowering improves suspension geometry on these cars but losing travel is not a good thing.
Yes, the current version of the QA1 LCA with it’s included bump stop will need some modification to do this, but the way the bump stop was added to the LCA makes it pretty simple.
And then they weigh about 8 lbs less, which is actually pretty substantial given their location.