The 2002 Porsche Boxster has 24 valves.
The 2011 Porsche Boxster has 24 valves.
The 2010 Porsche Boxster has 24 valves.
The 2001 Porsche Boxster has 24 valves.
The 2006 Porsche Boxster has 24 valves.
The 2014 Porsche Boxster has 24 valves.
The 2004 Porsche Boxster has 24 valves.
The 2007 Porsche Boxster has 24 valves.
The 2008 Porsche Boxster has 24 valves.
The 2009 Porsche Boxster has 24 valves.
The 2013 Porsche Boxster has 24 valves.
The 2003 Porsche Boxster has 24 valves.