Not sure but to me the look like the stock long slash cuts that are on my 07 SM. There is a post on how to debaffle them. (which will diffinatly make them LOUDER. This is the link to page 4 of said post where i have taken some x-ray pix of said pipes.
http://www.bonnevilleamerica.com/forums/...part=4&vc=1
