Weather its a pinched off tube or rolled over ends ,the end results is still the same, you will lose power and RPMS in either case .I don't feel this is a good fix ,what I think needs to be done is some testing back at the factory and get it to work correct then release it after its a proven working part.
What is bothering me is the fact I can and do build my own mufflers if I have to ,but its time consuming and allot easier to just get one prebuilt .I guess me being lazy on this has cost me more time and trouble than making it to start with would have been .As a rule I won't harp on a item unless its very good ,but this just pisses me off to no end and as long as folks keep buying there products there not going to do anything to correct the issues.