the back cap of the muffler is held on with 3 screws, remove those screws, the cap comes off, and theres an indented circle that those fit in. I found mine rattled/I think I might have been missing a part, but I just threw a thin bead of high temp rtv around them, waited for it to dry and then put them back in and they worked great.
Edit: totally didn't answer the question. They are silencers/db killers/baffles, whatever you want to call them.
Love is the feeling you get when you like something as much as your motorcycle - Hunter S. Thompson
I just mı̸̸̸̸̸̸̸̸̸̸̸̸̸̸̸̸̨ade you wipe your screen.
-2009 Suzuki GSX-R 750 Race Bike
-2007 Honda 919
-1995 Nighthawk 750 (Tboned)
-1983 KZ 440 (Sold)