Hi ,it uses a larger diameter tube, a thicker walled tube,and a stronger type of weld . Both the GTT lower braces offer a worthwhile upgrade, however having done a fair bit of testing ton all three GTT braces, the GTT Aerobox top Strutbrace IMO offers the bigest improvement of any single brace (even if you have an OMP ,
JCW or other top brace already fitted.)
Best Regards Roland GTT
