There is nothing wrong with Grit parts. Heaps of people i know run Yeah Yeah Yeah's and they haven't had any problems with them. They will most likely be stronger than the Districts because they are Chromoly and the Districts are Aluminium.
first of all he is running SCS which means no slit and thats usually where aluminum bars break, Also they are reinforced so i doubt they are going to bend and they are lighter than grit and they aren't grit, ive had grit big mistake waste of money