This only lowers a 2020 Silverado about 1.5 inches not the 2 inches claimed. The shackle measures about 2.8 inches longer than stock and since the axle is mounted very near halfway along the leaf spring, divide the 2.8 inches by 2 to get 1.4 inches of lowering at the centerline of the wheel.
Easy to install, takes about 30 minutes.
Belltech is good quality.