In 2002, Ford introduced a new 3-valve SOHC cylinder head with variable camshaft timing (VCT), improving power and torque over the previous 2-valve SOHC version. The 3-valve cylinder head was first used on the 2002 Ford Fairmont 5.4 L Barra 220 engine in Australia.[35] The 3-valve 5.4 L was introduced to the North American market in the redesigned 2004 Ford F-150.[WIKI]
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