I actually looked at and read the directions for those...
The system makes no sense at all.
Regardless, anything that ADDS an airbag to the stock original leaf spring will INCREASE the spring rate, and make the ride rougher, always.
If you want more ride ht, have a shop re-arch the stock springs, this will increase the hieght without increasing the spring rate.
If you want a smoother ride, and/or an adjustable suspension, use a system that uses a different, softer leaf spring, or removes leafs from the factory spring to reduce the spring rate, and then uses an air bag to adjust the ht and ride.
again, adding an air bag to the factory leaf can add rt ht at the expense of a stiffer ride, but nothing else.
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