Brocks Alienhead Exhaust

[BikerBoy]

With respect, I wouldn't count on the noise reduction plug on making a difference worth well over $100!

These plugs are pretty missleading IMO.
They do work, but do not reduce the volume by any audible level. 10db is like a fly farting in the wind.
However they do change the frequency enough to make it sound like it's quieter to the human ear.

I paid $25 for mine. Not a chance in hell I'd pay $100.

Earplugs are $2. You'll save $98 and they'll do a better job