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What we need is a gathering representing these fine exhaust sytems, a decible meter and a spreadsheet. Take readings at multiple RPMs and generate a graph comparing them. If we want to get real fancy use a Dyno graph of the same systems and overlay the results.
I would love to see volume vs power comparison as the Exhaust is my first upgrade (not for a few years mind you) and I am as concerned about volume as I am power.
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