Not a good idea to use stock shocks with lowering springs. They will be short-lived.
You are reducing shock travel by the amount that you are lowered.
Example, Bilstein Sport shocks have shorter shafts than regular Bilstein's, hence they are made for lowered vehicles.
Depending on the springs, I am not familiar with the Carlssons, if they are "linear" springs, it would result in a harsher ride.
If they are "progressive" springs, the ride wouldn't be as hard.
Either way, you should get the alignment checked, or re-set after lowering.
Normally, lowering a car will result in "flatter" cornering, aside from looking cool.
