We tried the springs from Rock Auto. Moog or AC Delco I forget which. Terrible results. We then ordered from Coil Spring Specialties and achieved excellent results. If I had known, I would have just gone to CSS in the first place.
That being said, even with the proper factory ride height, we still installed the air bags. It firmed up the ride and I can jack up the back an inch or so if I feel like it.
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