Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - small exhaust diameter up front and big out back??
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Old 12-08-2003, 04:16 PM
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You are confused. Smaller pipes are generally used on engines that need less air flow and are generally lower end type engines. Engines that make power consume more air and need the larger exhaust tubes. Air flow is related to engine capacity and output more than power band. You are not going to kill low end torque with larger than needed pipes, but you will kill high end power by putting a section of small pipe. The pipe will only flow as much as the smallest section.

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