Thread: FACT: You can't make more power with an aftermarket muffler...
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Old Apr 25, 2008 | 02:11 PM
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Shawnkey
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Joined: Jun 2007
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From: Rockledge, FL
Default FACT: You can't make more power with an aftermarket muffler...
Because the stock muffler is sooo efficient, and flows sooo much air...




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