Once this -2 degrees **** goes away I'm replacing my header and cat back. The header I purchased was junk (zr1?), and the header holes didn't line up on the last one. We left the bolt out and I was sure to put it somewhere safe for when I replaced it at a later date. Now I have forgot where that safe place was. It's no longer a stud in there it was an actual bolt. I think the previous owner pulled them out and replaced them all when the first header was put on. Either way I figured I might stock up on some of the **** while it's cold so I can do all the replacements with out running around the day it all comes in. The car is an em1.

 

You mean the studs on the cylinder head? They're 8x1.25

 

yeah is it fine thread pitch or extra fine?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importdreamer &raquo;</TD></TR><TR><TD CLASS="quote">yeah is it fine thread pitch or extra fine?</TD></TR></TABLE>
1.25

 

It would be considered fine thread. Coarse thread is a 1.50 thread pitch. Extra fine would be 1.00.

 

Answer might be in this thread https://honda-tech.com/zerothread/1885652

 

The previous owner didn't pull them out. After a certain year, they remove 8 out of 10 of the stud and nut combinations and used flange bolts in their place. It was probably save money in terms of materials and manufacturing time.