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#42: 02-27-2013, 05:55 PM
 
 pleaidestar
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Title: macaque
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Don't know offhand...left my calipers at work...but the v grooves are amazing in the 2.2, I'm using mine with that msd 8239 coil I told you about. I have 3k miles on them and they are the prettiest tan color to the ceramic and the electrode is still sharp. This thread is great for the information and the author is doing a lot of research and development