Hot Wheels Speed Racer 4-Pack. Mach 5, Yellow Racer X, Mach 6 and the Super Hard to Find Red Mach 4. Each car comes with a snap on battle accessory that may vary on each packaged car. Also included is a mini poster featuring other speed racer cars. Mattel 4 Pack. These are specially designed light weight cars and are the only Hotwheels cars that will work on the Speed Racer Race Track Sets. prince kaballa