O offthewallds CEG'er Joined Apr 6, 2008 Messages 442 Location Fourth and Gulf Coasts Jul 31, 2010 #1 I assume it is M18 x 1.5 but I just wanted to confirm this before buying a tap. Anybody know this for fact? Thank you! - Dan
I assume it is M18 x 1.5 but I just wanted to confirm this before buying a tap. Anybody know this for fact? Thank you! - Dan
S striker2 Official CEG Vendor Joined Mar 15, 2004 Messages 7,903 Location Arvada, CO Jul 31, 2010 #2 yes, they are M18 x 1.5, same as all O2s.
A amc49 Hard-core CEG'er Joined May 21, 2008 Messages 1,662 Sep 1, 2010 #3 Same as old big spark plug for '60s Ford bigblock like 360, 390, 352 V8.