Can anyone tell me, as far as riding in state parks in Missouri and Kentucky, if I would need to purchase a quiet core or silencer with an HMF pipe on my 400AT.

 

Im gonna hafta give you a YEA on that. its like 102 decibels or something. sure is cool. downside is, you cant hear when to shift if you're drag racing a friend with one. thats why one's on its way to me as we speak! i gotta fight back. My buddy never gets any heck from any one (besides me) at St. Joes though, its just louder than most pipes. I personally bought a quiet core, but i ride on land near other houses sometimes and i strategically try to avoid getting talked to about noise levels by authorities. that third talk convinced me.