Wouldn't bother back pressure will blow it out.
Doesn't look deep enough to get much water in there.
Thanks guys ! I am going to work in a minute, I will see today how it looks but as I said before I heard splashing sound coming from the back so the water must have got into the back box. The exhaust pipes were under the water, I have an aftermarket exhaust and its tips are slightly lower than the OEM ones.
Give it a good run. First get somebody to rev it while stationary
and see it any water is blowing out, don't turn it off, just drive it then.
Should be ok