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Re: ATG GM Engine Performance Class
Posted to Educators Forum on 4/10/2018 5 Replies

In this area Gary Machiros teaches the ATG classes. He's in the top 2 of the instructors I've had over the past 40 plus years. One thing you didn't mention is the class manuals. They are far and away the best class manuals I've ever had. I have a collection th... Login to read more.

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