Actuarius

New to forum and don't know if this is the right place for this question. I'm replacing the upper and lower control arms on my 2007 LS460. However, the rear lower control arm that I removed had a hole with a diameter of about 1 3/32" that fit over the lower ball joint and the replacement part has a hole of about 13/16". At first I assumed the aftermarket parts were bad but when I searched for other lower control arms they all seem to have the 13/16" hole. What am I missing? Thx.