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Old 08-06-2013, 09:39 AM   #2
thstone
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
The valve timing changes around 4K RPM to provide better high rpm power. Porsche calls this Variocam.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
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