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Would installing a stock exhaust of a bigger atv in place of a stock exhaust of a small atv be a practical substitution to an after market exhaust?

For example would i see any performance gains ( or losses) if i installed a stock exhaust from a 450cc atv onto my 350cc atv. After rejetting of course.

Would it not make much difference? Possibly be worst then stock because of too much flow?

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