Re: Modifying Bi-Turbo Pipes for an Avanti

Jamie /
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Doesn't the sport model already have an expansion chamber on the exhaust?

You may end up not gaining much at all with the BiTurbo pipe. I would however take the muffler off and look to see how closely the exhaust matches the outlet of the cylinder. Some of the pipes actually close the hole a little to reduce the power of your moped so that they can get the 2hp or less mark.

Jamie

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