it is not the same situation, but I have the white knuckle sliders on my power wagon. John was awesome to work with, and the sliders have taken a beating and never batted an eye at the 8000lbs rig
if it says test only then it has to go to a test only center. you can have anywhere do a "pre test" to make sure it will pass, but the system will not let any smog place do the official test. Just one of the many joys of California
apparently my pm did not go through. If you can get down there go for it. I was going to have a buddy pick it up, but it will be a few days at least before I could get him over there