know what your saying Jay, i have worked in engineering all my life and although obviously i have not tested said ally crash bar you get a "feel" for the materials, the one i made was 3/8" angle and its the angle that gives the strength, you could hang a battle ship off it its that strong, i feel happy with it from my understanding of materials but if someone popped up tommorow and told me its 5 times weaker than the stock item i would quite happily take it off, throw it in the bin and put the stock one back on
lets be honest mate we dont have these cars to "drive like miss daisy" and sometimes they get driven hard, there are ways to make the cars lighter but i think at some stage a line has to be drawn, for instance would you remove the side impact protection from the doors, there will probably be people out there who have removed the rear impact bar but i for one strive to make my car safer not the other way round