The 2009 Lexus IS-350 has 24 valves.
The 2009 Lexus IS-250 has 24 valves.
The 2009 Lexus IS-F has 32 valves.
The 2009 Lexus LS-460 has 32 valves.
The 2009 Lexus GS-350 has 24 valves.
The 2009 Lexus LX-570 has 32 valves.
The 2009 Lexus GS-450H has 24 valves.
The 2009 Lexus RX-350 has 24 valves.
The 2009 Lexus LS-600H-L has 32 valves.
Buy a battery with the most you can find. The more the better especially if you live in a cold climate.
The 2010 Lexus IS-350 has 24 valves.
The 2011 Lexus IS-350 has 24 valves.