In 2000, a unique trim level called “Spring Feature” was available on GT models. Offered only in Performance Red, Black, Silver, White, or Zinc Yellow, the Spring Feature package contained 17″ x 8″ performance wheels and tires, a body-colored hood scoop, body-colored side scoops, two black “GT” stripes on the hood, and black “Mustang” inserts on the embossed bumper. Ford produced 3,091 Spring Feature GTs.
In 2001, the Special Edition Bullitt was released to the public. Available only as coupe, the Bullitt was a mildly upgraded version of the standard GT. Factory upgrades included with a lowered suspension (3/4 inch), subframe connectors (used on the convertible models), Tokico shocks, and brakes from the Cobra (13 in front, 11.7 in rear). The car also received an upgraded exhaust and a re-designed intake. These power upgrades led to a factory rating of 265 hp (198 kW), a gain of five horsepower over the standard GT. On the exterior, the car received unique Torq-Thrust style wheels, removal of the fog lights and rear deck spoiler, as well as new trim accents. It was available in three colors: Dark Highland Green, True Blue, and Black.
The success of the 2001 Bullitt led to the production of a second special edition, the 2003 to 2004 Mach 1. The Mach 1 was equipped with a 4.6 L DOHC 305 hp (227 kW) engine based on the engine available in the 1999 and 2001 Mustang Cobras, with new cylinder heads from the 2003 to 2004 Cobra. The interior of the car was given a retro theme with seats made to look like the “comfort-weave” seats available in the 1960s-era Mach 1s. It also featured retro themed gauges and a unique aluminum shifter ball. On the vehicle’s exterior, a Mach 1 package was applied, as well as a functional Shaker scoop, a unique 3-tier hood, decals set on the hood, rocker/door panels, a special chin spoiler, a flat black-rear-spoiler, Magnum 500 style wheels, and a redesigned C-pillar. The car also received similar suspension upgrades as the Bullitt.
Ford celebrated its 100th Anniversary in June of 2003, and made limited edition F-Series Super Duty trucks, Explorers, Tauruses, Focuses, and Mustang GTs to commemorate the event. The 100th Anniversary models only came in black, and included Premium Verona-grain Imola leather seating surfaces in two-tone parchment, and the Mustang got the GT premium package which included 17″ wheels, anti-lock brakes and traction control; dual exhaust; power driver’s seat with power lumbar support; leather-wrapped steering wheel; and Mach 460 AM/FM Stereo with six-disc CD changer, as well as 100th Anniversary badges on the fender and decklid and embossed on the seats. The Centennial Package was a $995 upgrade.