I also installed a full system on my B King. I chose the Boz Bros system because i wanted to do away with the undertail cans altogether to clear the way for the dual nos bottles. The pipe was only about $100 more than most of the slip-ons I found. It was a fairly easy install and cut about 30 lbs of weight all together!! It is pretty loud even with the "stealth" baffle in place. It comes with a plate relocater and a new led tail light. It also included a wing that gets installed on the valve to fool it, so no codes
All in all, a great system. I installed a filter, did a little airbox mod and with a PCIII/custom map on the Dyno we had 186hp. Add in the 50 shot and yeehaa, now the B King is just what I expected. My new sprocket will be here tomorrow ( 17 tooth front) , now the last thing I need to do is get rid of these junk Qualifiers.