10-20-2017, 11:40 AM
My personal thought is that is because they never reinforced to begin with and it propagated FROM where the plates reinforce (which mirrors what I see on failures on these cars as the cracks reach out they increase the flexing of the entire floor). I won't discourage you if you really want to go that farther, just stating what I see when 99% of my race field is E46s being abused constantly, and none see that damage after the plate fix.
2020 Ford Raptor
2009 Z06
1986.5 Porsche 928S
2009 Z06
1986.5 Porsche 928S