Does anyone know of an online vendor that sells these? I didn't buy one with my exhaust, and Im thinking I might want one to make the bike a little more quiet for the next owner...

But I can't seem to see anyone thats got one...

 

call HMF direct, they are only $20

 

By the way, can it be used all the time?

 

The quiet core?......of course. Its just a tube with a sink drain screen welded on...nothing fancy thats for sure.