As for the mufflers, drill one baffle (on each side), then ride awhile. You can do the drilling without taking the muffler off of the bike. Keep drilling holes, making the size and pattern of the holes match on each side. If that is not loud enough for you, then remove what is left of the first baffle. Similiarly, proceed while intermittently riding the bike and drilling more holes. Once the material is removed, it is to late to undo it. No hurry, just make it the way you want it to sound.
