I've got the SE Pro slip-on's the 65115-98B's,with the changable end caps,mine are the "off road " or "not street legal" they have a nice low rumble,and still pass state inspection sound level here in NH.
My stock slip-on's were 88dbl the SE Pro slip-on's i havewere measured to be 103 dblduring my state inspection at the dealer.

 

Thank You.
These are the NON Street Legals, but Rush 2" look the same and sound just like my SE Pipes