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Old 08-04-2002, 08:36 PM
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427sharpe 427sharpe is offline
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Join Date: May 2001
Cobra Make, Engine: A CSX Cobra,1966 GT350 and an '06 Ford Heritage GT
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DynoMax inserts are quickly building a good rep. The average 'as delivered' set of sidepipes seem to average about a 5-10% hp loss..and thats a heck of a lot! I remember reading in the Shelby American that they did a dyno test on OE Cobras, and found that the oe pipes were draining close to 75 hp off of a 427!
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