Usage: Light Duty TruckTimbren Suspension Kits (SES Kits) are designed to enhance the suspension of your vehicle. Easiest to maintain: There are no airlines or fittings to allow leaks. Timbren Industries is a dynamic corporation producing Aeon(R) Hollow Rubber Springs.
Just put these on and they seam to work very well. They are basically passive overloads. They don't change the ride until you put weight on them. So when I hooked up my camper, everything stayed a lot higher up on the rear end.
Super easy install, haven’t had a chance to tow with them yet but bought them off of the recommendation of a friend, quality is good and price is great compared to alternatives for increasing towing and hauling without squatting