The Ford Modular engine is Ford Motor Company’s overhead camshaft (OHC) V8 and has seen a lot of Mustang duty across many years. The first production Modular engine was the 4.6 L 2-valve SOHC V8 and was seen on the Ford Mustang GT in 1996 through 2004 in several iterations. 2005 and onward Mustang GTs got a 3-valve SOHC 4.6 L with variable camshaft timing (VCT). The engines were equipped with an electronic Charge Motion Control Valve (CMCV) system that provides increased air velocity at low engine speeds for improved emissions and low-rpm torque. The 4-valve DOHC version of the Modular engine was introduced in the 1993 but wasn’t seen on a Mustang till 1996 in the SVT Cobra. The Cobra and Mach 1 both got the 4-valve engine from 1996 through 2004.