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Registered
Join Date: Nov 2001
Location: Weatherford Tx. USA
Posts: 98
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The identifying feature of the sodium filled valve is a small counterbore on the face of the valve...
The club sport had a sodium filled intake valve which IMO was more about saving weight since the rev-limit was extended to 6840 RPM...
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75 911S Coupe 3.4 Twin Plug - ITB - MegaSquirt
84 Carrera Coupe M491
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