To try to clear things up up a little . There are 2 kinds of front lifting or leveling spacers that Toytec and most companies sell .
One,the top plate spacer, goes on top of the the whole coilover assembly. The spring rate won't change so the ride,and brake dive will be the same.It goes between the coilover and the shock tower on the frame.
Looks like this....
The other goes on top of the spring within the coilover assembly and the spring needs to be compressed. They increase the spring rate a little and make for a firmer ride and less brake dive . Not that much but firmer. I would NOT use a hand spring compressor,like I did, on truck springs as they are real firm with tight winds. For safety,take the coilovers out and to a shop with a wall spring compressor.
They look like this...
You will need a alignment with any lift as the especially the camber will be off and the tires will wear on the outside. I'd wait a week or so for it to settle.
Some people put both on to get more spacer lift in the front and then a spacer in the back. Cheapest 3/2 but doesn't even compare in ride quality to aftermarket coilovers like the Ultimates,OW's or Icons. A case of you get what you pay for.
IsItMe's shop said it wouldn't work on his Limited,he pm'd me and I explained how to do it and they put them on for him today.Most shops are scared of the X-reas suspension and don't want the responsabilty.If you disconnect the hydraulic lines at the wrong place ,they are trashed and very expensive to replace. Don't know how much they charged him.For a shop to charge $450 to put on top plate spacers or any spacers for that matter is a rip off.It should take a reputable shop less then an hour for top plate spacers.