It has 2 in the exhaust pipe/ pipes. They will be up close to the engine.
The 2011 Chevrolet Silverado-2500HD has 16 valves.
The 2012 Chevrolet Silverado-2500HD has 16 valves.
The 2014 Chevrolet Silverado-3500HD has 16 valves.
The 2011 Chevrolet Silverado-3500HD has 16 valves.
The 2001 Chevrolet Silverado-2500HD has 16 valves.
The 2007 Chevrolet Silverado-2500HD has 16 valves.
The 2005 Chevrolet Silverado-2500HD has 16 valves.
The 2009 Chevrolet Silverado-3500HD has 16 valves.
The 2007 Chevrolet Silverado-3500HD has 16 valves.
The 2010 Chevrolet Silverado-2500HD has 16 valves.
The 2011 Chevrolet Silverado-1500 has 12 valves.
The 2012 Chevrolet Silverado-3500HD has 16 valves.