I worked for an Isuzu dealership for many years and installed many Calmini lift kits on Isuzu's, they are good kits and they seem to be built fairly strong. I had one of thier kits on my 1987 Trooper and loved it, it rode very nice, never sagged, and the rear springs flexed really well (I used it mainly in Massanutten, VA) Thier kits do seem to be a little taller than advertised though, which is a good thing if you are just wanting big tires, I had a 3 inch kit and actually got 4.25 inches of lift out of it and after about 90,000 miles it only lost .25 inches, and that was me beating this snot out of it every weekend AND driving in DC traffic during the week,,,,,,,,holy potholes batman!!!!!!