If all you want to do is safely secure the pipe, use a "U" clamp and wrap it around the pipe.Get a generic muffler hanger(a rubber style with many holes in it and a metal hook end) and slip the metal hook end in through the "U" clamp and tighten it down.Now drill out a hole (tap the hole if you wish)in your rear frame rail and secure it with a threaded bolt and washer.It will work as i have mine this way.

David