i just spent 400 on tires about 4 months ago, and the inside of my rear tires are worn out twice as much as the outside

16x8 ronal R9's

http://cgi.ebay.com/ebaymotors/KMAC-REAR-CAMBER-TOE-KIT-BMW-82-E34-E32-E28-E24-E23-M5_W0QQcmdZViewItemQQcategoryZ33581QQihZ015QQitemZ 250245518311QQrdZ1QQsspagenameZWDVW

i dont see how that would work, my friend bought one for his 01 civic and it helped his tire issues, but i dont see where it would go on my e23?