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i have an 01 zr600 efi, do they make a performance chip of some sort that will work for me?[/b]
no there is no chip out for the 01 or newer cats.

You can put a pipe on it and get a boondocker efi controller to adjust fuel.

I've done this in the past but with twin pipes and used a boondocker on my 01 600 cat. Worked awesome. Keep in mind that if you use a boondocker on a 01-02 cat 600's you need to ground it to the black w/white stripe wire on the servo motor. The ecu does not use a chassis ground.

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