I need to know if anyone is running a high performance muffler with the rest of the bike stock and how it runs. The Buell dealer is saying that the Pro-Series race kit voids the 2 year warranty. That´s crap. Trying to get around it just to get a good sounding muffler. If I bolt up a high performance muffler without the race ECM and high flow air filter will the bike still run just as good as new???????????? WD