CMB header O ring substitute

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Tom Foley

Well-Known Member
Supporting Member
Joined
Oct 27, 2005
Messages
7,172
Has anyone sourced the header O rings used in big block CMB headers ? I'm out and would like to buy a bunch . LMK if you have a part # or source . Thanks .
 
The rs style and evo and mline 91/101 and Vac91 exhaust outlets are .985” or 25mm
 
Last edited:
Tom,
If you want to eliminate the O-rings, you can milk out the header flange that holds the o-rings in and use Teflon. I machined the Teflon I.D. and O.D. to fit with .005 interference fit on the I.D. then used a propane torch to heat the Teflon to be able to force it on the exhaust snout.
 
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