It is possible to find cheap parts for a Volvo XC90 from many different sources. There are specialist parts dealers that can be found on the internet or on the high street. It may also be possible to source parts from scrap merchants. While considerably cheaper this would require more work to locate the relevant parts, and would carry the risks associated with the part having been used previously.
The 2011 Volvo XC90 has 24 valves.
The 2012 Volvo XC90 has 24 valves.
The 2013 Volvo XC90 has 24 valves.
The 2007 Volvo XC90 has 24 valves.
The 2006 Volvo XC90 has 20 valves.
The 2009 Volvo XC90 has 24 valves.
The 2008 Volvo XC90 has 24 valves.
The 2005 Volvo XC90 has 20 valves.
The 2004 Volvo XC90 has 20 valves.
The 2003 Volvo XC90 has 20 valves.
The 2010 Volvo XC90 has 24 valves.
The 2014 Volvo XC90 has 24 valves.