A couple things:I wonder if dynomax shortened the pipe to address this issue. I have my pipe all the way on and its at least a quarter inch away from that nub. To get it to cover that nub i would have to twist the hell out of the stock hanger rubber
1) I unbolted the stock hanger mount when I did mine. This gave me all of the latitude I needed for mounting.
2) I spun and turned and pushed the heck out of the Dynomax to get it as far on the pipe as I could. I bet yours will slide in further, at least to the little nub, if not past it (if you add a slot).