As the '99-'04 Mustangs get a bit older, the engines become tired and ready for replacement. While the stock Two-Valve Modular engine was a fine performer in its day (especially when equipped with a ...

When Ford introduced the SEFI 5.0L High Output Mustang in 1986 many predicted the end of the tunable engine. Ironically it was the beginning of a new era of super-tunable small-block Fords that would ...