CFR muffler mods

[craigv65]

I have a 2012 FLTRX with the fullsac Xpipe B, Tman 600sm cam and CFR mufflers. I was wondering if any of you had modded the CFR to get some back pressure, if so what did you do? Torque cones? I was wondering if just a bolt thru the muffler(located just past where it mounts to the head pipe) would help. Or a bolt thru the end of the Xpipe.

Thanks,
Cv