This is a link to a training video on Flowmaster's web site. Feel there is some good information on how the different Flowmaster muffler function that might help us in sales. FYI, on their converter line I do not have those parts in system so if we need to sell one let me know. They are using AP universal converters but they are making the direct fit units themselves using the AP universal converters. The pipe is mandrel bent so there may be some people who want to pay for this but warranties could be an issue.