no problem Jung..

but just go check out the price at wich other companies are selling solid control arm bushings ...

then polys are a really good replacement fro worn out factory bushings.. but i guess except for the squeaks on a brand new car you can replace the upper control amr bushings with poly ones and you wouldn't be able to tell the difference..

you know why ? because there is no or almost no gain in performance because they are still " compliants" ..

but neway poly bushings are good cheap alternative for replacing worn out bushings in most LCA parts..
( though unfortuantly they start wearing out extremely quick and they start from hard to soft in just about 1-2 years when driven hard )