If you remove the cats I doubt if it will pass emissions. Set it up with a cat free header, take it for testing with the zx mufflers which have the cats then put your slipons on till the next test.
The Japanese inspectors are smarter than that
It passed emissions (sniffer) with the stock pipe already. Every two years I have to get a visual inspection to remain street legal in Japan and no I do not want to switch exhaust out every time I have to get it inspected. I'm just concerned about baking in traffic. After owning my bike for 3 years and riding in a lot hotter weather than this for the first time ever I saw my bike reach the top bar on the temp gauge. After that I decided that it was time to take some preventive measures to ensure my bike makes it back to the states alive.