I'd say depends on the state and inspector,
I have a modified tractor muff on mine with a H.D. chrome cover heat shield
would pass any inspection.
This I do know
in California Some will look for California cert. stamp on muffs.So like I said depends on state N such.
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,