best exaust

Polaris

what the best slip on and jet size for an 04 preditor?

I bought my 05 Predator with a White Brothers Carbon Pro exhaust and a Rath racing header pipe already installed, so I can't tell you what the jetting is. I haven't had to mess with it. However, your jetting will not just be dependent on the exhaust. Jetting changes will have to take into account your intake (have you modified it with an aftermarket filter or intake kit?). You will also have to take into account your altitude (elevation) and the altitude that the quad will most often be ridden at. Also, have you done any modifications to the engine such as a cam, port work, larger displacement piston, etc. All these variables have to be considered when rejetting the carb.

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