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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