The only way to get more power is to go with Canisters. If the plane were mine I wouldn't put a exaust diverter on it. They are simply annoying and make the plane look ugly. The canister is really the better setup...especially for the DA 50 in an aerobatic airplane. If you must do this though there are tweo mufflers that DA sells and both run equally well. As has been stated there have been changes made to the mufflers since they originally came out. You really ned to contact Desert Aircraft concerning which one is best for application though. Nobody will be able to give you info like Desert can. After all, that's what they do every day. [8D]