Wide body kits at this moment is not something unusual. Especially for BMW or some supercars like Ferrari or Lamborghini. But almost all they are installed by rivets. Here installing was a little more serious and now it looks like a complete part. By the way, this kit is looking well with M-bumpers. Color was selected well, car attracts attention.
And what about suspension? Here is a typical tuning project in this meaning - suspension is on airlift. Cars with widebody kits, like this BMW 335i, can have really wide wheels and lay on the ground if it's needed.