blue_toaster

I have an 06 xB and I just put some 18x7.5 rims with 225/40zr18 tires and took it for an alignment. They said the front was good but the back needs a toe shim kit. My question would be which shim kit is better? Moog has a K6717 kit with -1, -2, -3 and -4 suffixes and I don't know what those mean, any help would be appreciated!