I recently picked up a 2009 Nightster with, what I was told were stock pipes. There are no baffles in the exhaust piping and I'm having a hard time tracking down any with a 2.75" interior diameter. The bike sounds great, I'm just worried about the drone on longer rides. Can anyone point me in the right direction for finding some replacement baffles?

Also, the bike has a power commander 5 stage 2. Will adding baffles require a new tune?