The 2004 Mercedes-Benz C-Class has 16 valves.
The 2004 Nissan Armada has 32 valves.
The 2004 Mazda MAZDA3 has 16 valves.
The 2004 Toyota Avalon has 24 valves.
The 2004 Hyundai Sonata has 16 valves.
The 2004 Hyundai Elantra has 16 valves.
The 2004 Lamborghini Gallardo has 40 valves.
The 2004 Honda Odyssey has 24 valves.
The 2004 Acura TSX has 16 valves.
The 2004 BMW Z4 has 24 valves.
The 2004 Mazda MAZDA6 has 16 valves.
The 2004 Volvo XC70 has 20 valves.
The 2004 Ford Expedition has 16 valves.