Thread: zetec 3mm oversized exhaust valve question - urgent!
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Old Jul 19, 2008 | 11:56 AM
  #16  
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pa_sjo
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It's not so much valve size on a zetec that needs sorting, it's just the port shape.. a 28mm valve on a YB can flow an awful lot!

Personally I think 3mm oversize is ridiculous on a zetec.
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