boot trim ring and door lock posts, and aluminum-look bezels on the dash. The most noticeable difference visually from other Mustangs was the bulging hood with cut-out and the return of a semi-legitimate "Shaker Hood". While physically identical in placement and function (the scoop is said to be built on the same tooling as the 1970 Mach 1) it only provides a portion of air to the engine routing to the airbox ahead of the MAF. It does function well as a cold air "snorkel" and a partial Ram Air at speed. 2004 saw only minor cosmetic changes to the Mach 1. 2004 Mach 1s can be identified by bare aluminum finished valve covers, as opposed to the 2003's black finished covers. Outside, 2004 Mach 1's have 40th-anniversary tags ahead of the doors while the 2003 has the traditional Mustang Running Pony and Tri-Color bar. The lone interior change was the deletion of the overhead "cargo net" mounted on the headliner. Despite pre-production rumors, the horsepower and torque ratings were not increased in 2004. Power rating was and . The 2003 Mach 1 was originally offered in Black, Dark Shadow Grey Metallic, Torch Red, Zinc Yellow, and Oxford White, as well as Azure Blue that was exclusive to the Mach 1. For 2004 Zinc Yellow was replaced with a more vibrant yellow called Screaming Yellow, as well as adding a new color, Competition Orange. With improvements in power and a relatively light curb weight of 3,380 lb (1,533 kg), the 2003 Mustang Mach 1 posted magazine test numbers that were impressive given its $29,305 price tag. Magazine tests by Motor Trend found numbers from 13.88 seconds at for the automatic equipped 2003 Mach 1 with a 5.6 seconds 0–60 mph, up to the five speed's 13.5 seconds at with a 5.2 second 0–60 mph (97 km/h) time. All this while maintaining a decent on a slalom and 0.85 gs on the skidpad, though the higher CG of the larger DOHC engine has created a tendency to understeer more than the IRS equipped SVTs and lower CG and lower curb weight Bullitt GTs with the same basic suspension and brakes. Limited in production, the 2003 and 2004 Mach 1s ended with the New Edge body platform, the discontinuation of the Fox framed unibody, and the introduction of the first new frame design since 1979 the s-197 with 9,652 2003's and 7,182