Thread: bypass pipe or hollowed cat? (long)
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jmohn jmohn is offline
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Join Date: May 2002
Location: Lakeville, Minnesota
Posts: 1,116
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I have been told that a gutted cat. is less effective (performance wise) than a "test" pipe. I have never verified this.

Jerry M
'78 SC
Old 12-20-2003, 08:50 PM
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