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Why did my exhaust tone change?

What kind of tuner do you have on the bike e.g. Power Commander, Screamin Eagle.

The reason I was asking is that on my deluxe I have the power commander and I can change the tone of the exhaust just by changing the fuel map.
My guess is that in the installation of the garage door opener the tuner was remapped…MD
 
Wow. Thanks for all the replies. Here goes: the exhaust looks OK, no cracks, everything tight and baffles look ok too. There is no tuner or fuel remap. So I'm hoping I just got some bad gas. I had to stop in the middle of nowhere at a little store. And, yes I have opened the garage door with the engine running! I asked the dealer's service guys if they had done anything that would affect the exhaust and they assurred me thy had not. The real problem is I liked the sound better before.
 
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