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      10-15-2012, 01:47 PM   #16
pbonsalb
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Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

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How much power does a rear exhaust add on a supercharged car? It adds nothing or very little on a naturally aspirated car. A good x-pipe adds up to about 25 rwhp on a naturally aspirated car, so I see those gains being leveraged by boost on a supercharged car.