2 baffles (look like freeze plugs) per muffler. Some owners have knocked out only 1, and like it. Most knock out both.
Some have put on long shot guns and then adapted baffles for them.
My take... And I'm 60 years old
OEM..... Way to soft a sound, and it is a heat issue
1 baffle out.... Not bad sounding..... But still blocking heat escape.
2 baffles out ( like mine)..... Sounds really quite nice, but if a goldwing owner is following, he'll bitch.
Long shot guns no baffles..... Really sound sweet, but you don't want to follow him if he/she is in the throttle hard a lot.
OEM slash cuts...... They are going to hear you a long ways away
Short shot guns.... Nice at idle..... I don't like them any thing over that.
Staggered short shotguns..... Brutal
Several owners have also adapted/built/found other items out there with way to many examples to list here. All with a great variance of tone and sound.
Bruce