Brick wall under boost at high rpm

[LaunchHard]

I've been reading as many other posts as I could find but have not solved my issue.

1g significantly modded running with 2g mas

Had the same setup and tune for years but this problem started occurring recently. At around 5k under boost the car falls on its face. I did a boost leak test and fixed any leak I found. Also fixed an exhaust leak and replaced the o2 sensor which was throwing a cel.

Car is tuned at 400 whp with no changes in years. I was thinking the 2g mas may have gone bad or an injector or fuel pump failing. Any suggestions are appreciated.