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Old 08-10-2011, 10:38 PM   #3
MikeOD

 
Drives: 2010 M6 2SS
Join Date: Mar 2011
Location: South Windsor, CT
Posts: 1,202
They are powdered metal...which is a process GM has been using for decades now.
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2010 Camaro SS M6. Heads/Cam/Intake/Headers/Exhaust/Suspension
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