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Old 06-04-2009, 10:31 PM   #2
mirage83
12psi boost
 
Join Date: Feb 2007
Location: Georgia
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Guessing that you're planning on a metal head gasket, it depends on how much if any metal needs taking off the head and/or block when you have it decked for the mhg. IIRC, a 1.2mm is about right for most jobs but only your machinist will be able to tell you sure. He'll know how much metal was lost.
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