My brother has an older rolling chassis from an older vw beetle,(rear engine air cooled irus, not swing arm) we are prepping it to drop a bradly gt kit body on, and are replacing some suspension components, including the rear control arm bushings, and bolts. The one side did not have a bolt in it at all so we replaced it first. The other side uses a hex/allen wrench, which i don't happen to have one that particular size in my tool box at this time. I was just wondering if anyone could tell me for sure what size it uses. I believe its a 17mm but im no Volkswagen guru.