Long story short I ordered two mufflers from RockAuto for my 2006 Cadillac DTS. I was traveling on business for the past two weeks and one of the mufflers blew out and the other is not far behind. I only have a few days at home before I have to leave on another trip and did not want to listen to the noise on yet another trip, so I had them shipped and made the appointment for tomorrow to get them put on. I got home this evening and opened the box and both mufflers were shipped in the same box without any packaging inside. Needless to say both mufflers are scratched up and one is dented. I called customer service and the only thing they can do is replace them once I ship them back to RockAuto. They did not even offer expedited shipping on the replacement order. I really do not want to listen to the loud exhaust on another 6 hour drive. Should I just go ahead and put them on? Will the dent possibly cause premature failure? Need advice?