inline4, the Kerker for Kawasaki pipe you show is not the same pipe cafe750 is showing. Close, but no beer.
Terry, you are right about the Kerker baffles, but take another look at the pipe itself. The sharp bends (especially in number 4 header pipe), right before the collector, distinquishes this pipe as a sophisticated knock-off. The header pipes are very short, hence the need for those sharp bends. Also, with such short header pipes, the twist in the collector pipe allows this pipe to sit more snuggly up against the engine, which is another sophistication absent in most Kerker and Mac bends. Nice pipe, though. Terry, have you got a picture of the pipe you are referring to, showing these exact features?