no it was not an offered factory option
Porsche 911 because 911 has more ecceloration
Porsche 911 starts from....$85,400 to........$172,100
The 2001 Porsche 911 has 24 valves.
The 2003 Porsche 911 has 24 valves.
The 2002 Porsche 911 has 24 valves.
The 2006 Porsche 911 has 24 valves.
The 2005 Porsche 911 has 24 valves.
The 2009 Porsche 911 has 24 valves.
The 2004 Porsche 911 has 24 valves.
The 2011 Porsche 911 has 24 valves.
The 2010 Porsche 911 has 24 valves.