there is a drill bit that if i remember right somebody made, floating around out there that has been being passed around for yrs. i am sure if you posted that you are looking for it, it would show up. it has a name but i cant remember what it is right now but from what i recall it works quite well at removing baffles. a number of people have used it. but then there is always chevy, he will buy yours and sell you his debaffled and from what i hear , his pipes sound pretty good.
