I originally published this article in 2012. Though I’ve made major advancements in certain areas with all three of these heads, the basic info here
Author: gasketscraper
Tech support for Len Hoffman (Hoffman Automotive Machine), newsite.hamheads.com
Why do 996 911 Porsche cylinder heads Crack?
Click here to see video of a 996 3.4 M96 head being pressure tested, revealing a microscopic crack that was not visible to the naked
Ultrasonic Parts Cleaning
When we purchased our Eastern Precision EP3523 Ultra Sonic parts washer in 2011 the use of ultrasonic’s was relatively new to the automotive industry, but
Hoffman Automotive Machine (706)769-3783 
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