I have been running the FMF powercore4 for a while now and even new it was loud. So I am tired of the dirty looks, hey I live out in the boonies have three neighbors closest is a 1/4 mile away. But I do want to respect others so, will find a quieter muffler. Any info. suggestions will be appreciated. I know this is going to be a growing issue nationwide. For you that is going to say put the stock back on- screw that! I am also planning on doing some club rides and they have a tech inspection with a 92db @ 3400 rpm limit! I have thought about this awhile and Have considered the xrs only piece with the insert, but it still may be louder than 92db. Speak from experience please, I do not want to cork my exhaust I know the louder the faster, but I want fast and relatively quiet.