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Old May 11, 2005 | 04:37 PM
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Kai
Rotorphile.
 
Joined: Mar 2002
Posts: 10,120
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From: Richmond, VA
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A GS-R manifold with no butterfly plates is ten times worse then a "normal" upturned style aftermarket manifold. If you go back to the stocker, leave the butterflies active.
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