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i have a pedro mod on my car and I notice one sound from the muffler at lower rpm and then a totally different sound at higher rpm.
i wonder if the pedro mufflers could also have an issue where at certain rpms, the amount of air that actually makes it into the bypass pipes changes? i notice the sound of my pedro muffler is different at low rpm vs higher rpm - which could be the result of air flow/velocity allowing more air to get into the bypass pipes, but at high rpm less can make it due to more of it flowing out the "real" muffler piping and less can divert/escape into the bypass pipes??
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