Some items may be priced by the each, per pair, or as a kit. Some technical knowledge and tools are necessary for installation of these parts, so don't forget to add in labor costs if you are not going to do the work yourself. If you have a specific question about your truck's suspension, you can Post Your Question on the Truck Tech Forum . A higher spring ratio makes drop springs handle better compared to stock springs, but the ride is usually more harsh. Coil springs can be used on their own, or combined with a drop spindle or control arm for an even greater drop.
Drop spindles replace the stock spindles.
The location of the axle in the spindle is higher than stock, thus dropping the vehicle. Drop spindles are available in 2 to 3 inch drops, depending upon which truck you own. These lower control arms replace the stock ones and essentially move the coil spring down. Control arms are available for drops of 2 to 3 inches. They move the rear leaf springs higher to make your truck lower.