The 2003 Subaru Legacy has 16 valves.
The 2003 Volkswagen Passat has 20 valves.
The 2003 Audi S6 has 40 valves.
The 2003 Kia Optima has 16 valves.
The 2003 Kia Rio has 16 valves.
The 2003 Audi A6 has 30 valves.
The 2003 Chevrolet Malibu has 12 valves.
The 2003 Chevrolet Express has 12 valves.
The 2003 GMC Yukon has 16 valves.
The 2003 Volvo XC70 has 20 valves.
The 2003 Porsche Cayenne has 32 valves.
The 2003 Toyota Tacoma has 16 valves.