Use these fancy little overly machined billets to fix your squatty coil springs. We have found that the Dobinson springs, though great tend to sag. These spacers sit between the top of the spring perch and the frame to add 12.7mm of height to them. If you are running the OME spring they will help, but ideally you should swap to Dobinsons.
You lifted guys who tow, or camping families with loads of gear and no airbags, these will help get you sitting right!