I've been curious about these Chinese slip-ons as well. When one gets down to it.....as far as performance; they're all the same. It's a matter of noise. But how durable are the Chinese ones? Many times I find the Chinese knock-offs are the same as the original and come from the same factory. The akropovics in particular. Would be a good idea maybe to start a thread on one's experience with Chinese knock-off mufflers. One of these days I may try it out. A few youtube video reviews of some of them.