Mach 4 (WildStorm)

The Mach 4 is a vehicle featured in the Speed Racer franchise, most prominently in the 2008 live-action film as the car driven by Rex Racer before his death. This vehicle is the predecessor of the Mach 5 and the Mach 6.

Wildstorm/DC comics
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2008 film
The Mach 4 was featured in the film as Rex Racer's car for professional-level races prior to his death in the Casa Cristo 5000. It is a professional-level race car like the Mach 6, but is red and the bodywork resembles the Mach 5. It has a white version of the distincive 'M', along with its racing number also in white complimented by a white circle.