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CRF250X Emissions

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It doesn't rob any power. Pipe may run a little cooler without it, and you may notice a little less of throttle popping if your lean or run an open pipe. Other than that there is no gains in power.

It's not a pump so it doesn't uses any energy. Just gives the exhaust a sip of fresh air to help burn up any un burnt fuel coming out the exhaust port.

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