Thread: Yb head thickness quick question
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Old Jul 1, 2008 | 10:08 PM
  #14  
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Micky The Finn
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From: in the nite garden
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Originally Posted by PGT
my head is 137.4mm and works fine - the valve seat inserts are on the face though

ive ran loads of group A escorts at 137.4mm with no troubles at all.
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