I got fed up with breaking or worrying about breaking the bulkhead on my XB4 2015 so I drew up and had made a 3mm carbon brace. Well 2 different types actually as I was talked into it buy a fellow racer
The first type is attached using the lower 2 screws each side and the top larger holes are there so the shock tower remains attached when changing the front diff.
The second type is attached using all 3 screws each side but this does mean 2 more screws to undo when changing the front diff and the shock tower wont be attached so slightly more of pain to change the diff.
Both have a recess in the back to clear the diff case as this is slightly thicker than the tower.
I have a few of each left over to sell complete with screws,
they are £10 each plus £2 p+p
2HF
3HF