Thanks for the response. So the cat is not under the bike on a 2011? That big bulky collector seems a little useless if it isn't full of some type of power robbing catalyst. Why bother with such a heavy and bulky looking box? I have not taken the mufflers off yet but if they are indeed part of the catalytic system they must be very heavy. Has anyone every tried to dissect a factory Rocket muffler? Well I hope to have this thing pulling some good reaction times soon. I will say that this bike has unreal amounts of torque and power in its stock setup. I cant wait to get it figured out.