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That is the gasoline team. I am not sure. It is in the shrink fit album so maybe they wanted some carbon as a lubricant? Either that or they are depositing some carbon in order to case harden it later in the heat treat furnace.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
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