It's a shame that you cannot ask a simple Q without getting slagged off! regards the grammar, we are not all perfect, It does not matter if the body kit was not part of the car the responsibilities of the garage are, if the car had come in for an exhaust & the exhaust that came off had been extended the garage should have measured up the new one accordingly, if the body work has been damaged due to warping by the new exhaust then its up to that garage to put it right, have a word with the garage before you go any further, do you have a witness regards the condition of the rear end of the car before it went in? be truth full Hotwheelz!! liars can be caught out in more ways than one & by saying that I am not implying that you have lied.