Quote:
Originally Posted by ChuckB
Eisenmann "tunes" the exhaust by measuring 46 points along the exhaust flow for pressure, flow and temperature and fine tunes these values to suit each engine perfectly without regard for the cost, hence double the cost of a stock exhaust. The exhaust note at the tail end is the easy part, but just opening it up would unbalance the system and cost power and fuel.
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I would have to disagree with that. Less back pressure = faster turbo spool up = more power. The tuning is more for sound at that point.