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      07-22-2009, 12:53 PM   #23
Imran@Evolve
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Drives: E60 M5, E92 M3, E46 M3
Join Date: Jun 2008
Location: Bedfordshire UK

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Here are the results from just the Akrapovic Evolution System

Flywheel figures for all those in Europe



And wheel power for all those stateside



Does what Akrapovic says it does - rare for manufacturer claims to match up to the real world these days.