Update. I installed the stinger, I used a lawnmower muffler, and added a belly stinger to it. I took some conduit and measured it so it would start at about the middle of the belly. Then welded that to the lawnmower muffler, then welded that mess to the expansion chamber. It is actually very reasonable with the sound level, it revs pretty decent, and HOLY $HIT did it give this thing some bottom end!!!! I can start off from a dead stop under engine power, without pedaling WITH A 32 TOOTH sprocket!! I love it! And I did it all myself, with the help of this forum! Thanks guys!