tri-z silencers...

[factoryX]

Is there any with a spark arrester other than stock? If not is there a silencer that makes a loud bike become quiet? And again other than stock.

[MTS]

DG makes one, how loud it is i dont know,

[Tri-ZNate]

http://denniskirk.com/jsp/search/search.jsp?searchString=cobra+spark+arrestor

Cobra makes bolt on ones for many brands