I want to install a heavy breather on my 2008 FXDL. I asked the dealer where I bought the bike and I was told I don't need to install anything else like a power commnader. He said the bike will adjust itself. When I called another dealer and asked the same question he said I would need a power commander or a race tuner. I don't know who to believe. What do I do? ?The dealer where I bought the bike said it wouldn't do any harm to the motor but I read that it could. I also would like to change the exhaust in the future, I am running slip-ons right now.