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What is the easiest way to drill EGT probe holes in the TSIO
550?  Do I have to take the turbos off to make sure chips
don't get in?  AS you know it is a lot of work for six
holes, so any insight would be appreciated.

Thanks in advance.

Michael D Smith

LML homepage:   http://www.olsusa.com/Users/Mkaye/maillist.html