As described in the book ‘Ici commence l’aventure’. This front axle reinforcement is suited for 2CV, AK400, Acadiane and all A-types. Often people only weld an L-profile, but then you only have 1 angle of 90°, and it’s this angle that serves the actual reinforcement. This is why we use the U-profile like original.
In the 70's, Citroën recommended to strenghten the front axle for offroad-adventures, raids and cross. The part is welded to the front axle and fits both 2cv as the AK400 / Acadiane.