Finally got the pdr-40 installed,had a heck of a time trying to get the down pipe clamp to seal,if the exhaust brake is on it sounds like one heck of a leak after repeated attempts of removing and retighting the clamp I'm not sure it will ever seal . The other question is there a silencer ring for the hx-40 ? The noise is more than I can take as a daily driver, it would be cool for an occasional joy ride,I haven't driven but a few miles as of yet but testing will be under way this week, got to break it in gently ya know. If anyone else has experienced trouble sealing the down pipe or has ideas please let me know or maybe on old silencer ring laying under the bench somewhere. Tim