The rear strut-type lowering kit is adjustable much the same way as a tie rod. You can expect about 1-1/2" to 2" of lowering. It's your high-tech answer to improved cornering. Some applications use a lowering link that looks like a tuning fork. These are non-adjustable and lower the rear 1-1/2" to 2".
Lowers the center of gravity without diminishing the ride quality or the suspension travel.