I bought these pipes because I liked the black ceramic coating. They're pretty darn loud and the baffles aren't replaceable. They say that the baffles are welded in.
I was riding this weekend with a C90 and he had HK pipes too. Also had the end caps and a 'homemade' noise baffle. We were chatting and I asked him about it. Said that he went to hardware store and picked up a drain trap...you know, the thing that catches all the bits of food so they don't go down the drain. Trap is what I call it, maybe there's a proper name. Anyways, the end caps for the pipes keep the trap inside. His looked pretty 'airy' like he enlarged the holes somewhat. Now I didn't hear his pipes before his 'baffle' but they sound pretty toned down with it.
So last night I ordered the chrome end caps for my pipes. Had been considering getting them anyways just to accent the pipes. Planning on trying his method and seeing what happens.
Anything I should consider or be careful with? I plan on going with as little restriction as possible to begin with and see what the impact is on (subjective) volume from the pipes.
Just so you know, stock air filter and no fuel processor. Bike seems to run fine without needing either of these upgrades.