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Old 10-19-2007, 05:24 AM   #28
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Join Date: Jun 2007
Location: Maryland
Posts: 275
The outlet pipes are plumbed to the two outer chambers. Enlarging the holes in the inlet pipes at that point would allow more direct flow from the inlet pipes to the outlet pipes. I believe some people do this without cutting the muffler apart by grinding away with a dremel attachment down the bore of the inlet.
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