The Ford Mustang Mach 1 is a performance-oriented option package of the Ford Mustang muscle car, originally introduced in August 1968 for the 1969 model year. It was available until 1978, returned briefly in 2003, 2004, and most recently in 2021. As part of a Ford heritage program, the Mach 1 package returned in 2003 as a high-performance version of the New Edge platform. Visual connections to the 1969 model were integrated into the design to pay homage to the original. This generation of the Mach 1 was discontinued after the 2004 model year, with the introduction of the fifth generation Mustang. Ford first used the name "Mach 1" in its 1969 display of a concept called the "Levacar Mach I" at the Ford Rotunda. This concept vehicle used a cushion of air as propulsion on a circular dais. Introduction The Ford Mustang was successfully introduced in April 1964 as a sporty pony car to attract younger buyers to Ford products. After a few years of development, Ford saw the need to create performance Mustangs to compete with GM and their release of the Chevrolet Camaro and Pontiac Firebird. As the performance war continued, the Mustang's platform and engine bay were progressively redesigned to accommodate larger engine blocks. Late in the 1968 model year, Ford introduced the 428 cu in (7.0 L) Cobra Jet FE engine in a small group of Mustang GTs and into the 1968 Shelby GT500KR. This was a strong performer and indicated the direction of the 1969 Mustang. However, "GT" was deemed insufficient to describe performance, thus the Mach 1 model name was introduced. First generation (1969–1970) The 1969 Ford Mustang featured numerous performance-themed model names and engines. Six factory performance Mustang models were available (GT, Boss 302, Boss 429, Shelby GT350, Shelby GT500, and the Mach 1). Additionally, seven variations of V8s were available in the 1969 through 1973 models; most of these were also available in the new Mach 1. Due to the Mach 1's success, the GT model was discontinued after 1969 following poor sales of 5,396 units versus the 72,458 sales for the Mach 1. The Mustang would not wear the "GT" badge again until 1982. The Mach 1 package was only available in the "SportsRoof" fastback body style (previously known as the 'fastback'); never on the hardtop or convertible. Many resto-mod visual conversions have since been performed by owners and enthusiasts,