Exhaust System From headers to exhaust tips

o2 thread size

Old Jun 9, 2009 | 09:52 AM
  #1  
tomsws6's Avatar
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o2 thread size

ok it looks like i need to tap my headers for the 02 sensors. i think the threads are screwd up. anyone know the size? i thought it was 11/16 by 16.
Old Jun 10, 2009 | 08:40 AM
  #2  
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? 1/2 NPT. Not for certain but that is what jumps to my mind.

Now Im beginning to question myself. that sounds small

Last edited by redneckgames; Jun 10, 2009 at 08:46 AM.
Old Jun 10, 2009 | 11:19 AM
  #3  
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yeah iv been told 18mm x 1.5 too
Old Jun 10, 2009 | 05:28 PM
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M18-1.5
Old Jun 11, 2009 | 09:10 AM
  #5  
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just remembered, the one I was working with was not stock. It was with the edelbrock a/f monitor.
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