The girlfriend gave me the HD garage door opener, and not wanting to mess with the wiring harness, I took my 08 Heritage Classic to the dealer to install. When I got the bike back the exhaust was noticably louder and the tone changed from the throaty sound to a slightly sharper tone. The girlfriend noticed it too. I can't imagine how the two could be related, but nothing else changed. It runs OK. Anybody have any idea what happened?