I'd go with the Skunk2's instead. It replaces the control arm at the top and i think gives you 4 degrees either way. not sure on the degrees.

Some people have said you don't need a camber kit (if you only go with sport springs). The most important is the toe angles. you have to make sure they're perfect otherwise your tire will wear out more than usual.

Others have gotten alignments and have ditched the camber kits. They claim that they're doing ok as long as they rotate their tires often.

I'm running the tokico illumina shock/spring combo. I've got about 1.5 inch drop. I've been running on my potenza re730 for a bit and have seen no unusual tire wear. I just made sure that my alignment was perfect (except for camber and castor)

If you want my opinion on those camber kits.. I'd go with Skunk2 instead. There are many posts on camber kits in this forum. Check them out. People talk about Ingall's or Skunk2.