Ok guys dumb question...
What does the number on the rear arm represent?
The kit comes with an x-3.0 and there's also aluminum 2.0's, 2.5's, and 3.0's available.
Do these have anything to do with how many shims I put under them? My set up sheet calls for 4 shims under each rear arm. I have an aluminum 2.5 on there now. Which arm would be correct?