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Thread from the dead :D Sorry, been away for quite a long time. Here's the correct link: http://www.cox-internet.com/stangman/qtrtrim.html

Been running Mobil1 for 6 years in my motor, and I pulled the heads off last year to install my AFR's, and my cylinder walls had 0 ridge and still had the factory cross hatches in them. I don't think it's wearing too bad. :shrug: