My Dg springs ride really harsh. It feels like the shocks aren't even doing there job and the car smacks the bumps very hard. Sometimes the wipers go on. The right front side is the biggest problem. I checked the endlinks and other stuff and everything looks good. Any ideas ???
12k miles? Sounds like the roads are just garbage and the 18" low profiles are harsh. I'd upgrade the shocks for good measure but 17s will probably help you more.
If you're happy with the ride height of the DG's, then I'd upgrade the dampers if the stock ones aren't cutting it for you...there will be a difference