that metal is definatly support for the car "strongest point" probably not but it really depends on how much and how high he cut. theres probably half an inch of overhang that wouldnt do too much structual dammage if he modified it but ya if he removed the whole thing then his car is fucked. on another note i cut a big ass piece off the stuctual bar under the hood of my car (not the main structure peice but def worse then a lil bit of the rear deck) and got in a wreck on that side. but they concluded the damage would have been the same with or without the cut