Leaf Springs shipping time is 6-8 weeks.
All of our springs are intended to return the car to factory height. Because of that, installing new springs will almost always increase the height of the rear of the car, as the factory leafs sag over the years. The competition springs will sit slightly lower than standard springs, somewhere between 1/2" and 1" lower. The competition springs cause the car to have a slightly lower the center of gravity and the competition springs are a stiffer spring, so these factors combine to help provide improved handling.
In most circumstances these ship directly from the manufacturer. Sold as a pair. Actual product may vary from picture.