No way is that aluminum bar as strong as the 0.125" wall Chrome-Moly tube I made one out of ... and those attachments to the strut towers look pretty weak without any gussets!
An interesting data acquisition experiment would be to epoxy a strain gauge to the bar and both attachment brackets ... and log a couple of hours worth of data during a DE or autocross with one of these DAQ modules attached to an old Windows 98 laptop ...
http://www.measurementcomputing.com/cbicatalog/cbiproduct_new.asp?dept_id=352&pf_id=1535