That's exactly right. California so far isn't interested in sound laws. The fed originally set up sound laws but then, due to the complications of implementing and enforcing regulations, turned it over to the states. Some states have sound laws but, interestingly enough none in California. However if noise is considered excessive then you can be cited under disturbing the peace like they would the ricer cars or loud stereo systems. This usually only happens if you piss off a cop. As far as the emissions I'm not against having a a cat at all. I am amazed at how far behind motorcycle technology is compared to automotive. I mean Ford can get a 2 liter ( 2000 cc ) motor to put out almost 300 HP, produce zero emissions, pull a 10 second quarter mile, and behave to get groceries while still hitting near 40 mpg while weighing in at over 3k lbs. Shouldn't a bike with half the engine size and 1/4 the weight be able to do better millage and something close to that power and no emissions? Anyway, all I want is to keep my cat doing its job and add a nice performance muffler. I don't really want to drill the baffle on a brand new muffler and I'd rather have something designed with performance in mind. I guess one option is to find an old muffler and drill it to my liking. Anyone have one around?