How can a muffler go out on an F Body when a Corsa doesn't have any packing? I am curious, as we have never had a problem with any Corsas we installed, and the GM Dealer near us does a ton on Vettes and I know he is in the same boat - problem free. I know of one customer that had a minor issue with fitment ( shipped system to him ), and they sent a whole new system out to him, and just asked him to send them back the old one. We use their systems almost completely due to their quick service and quality, and DC uses them on the Comp Coupes. They obviously wanted to help this gentleman out also, and I think alot of folks will stand up for them on the issue of service and quality.