Ford 2 Valve Engines Introduced in 1997, the SOHC 2-valve 5.4L has a cast iron engine block and aluminum cylinder heads. The 5.4L features multi-port fuel injection, roller finger followers, fracture-split powder metal connecting rods, and in some applications a forged steel crankshaft. The 2-valve SOHC 5.4L engine was on the... read more