This Hot Wheels original design is a twelve cylinder mid-engined supercar and resembles a McLaren F1 GTR. It is the final car in the Hot Wheels: Velocity X racing game. It is also playable in Hot Wheels: Stunt Track Challenge and it replaced the Pontiac Rageous in the Hot Wheels: World Race video game. In the Highway 35 World Race movie, the CLYP robots use HW Prototype 12 cars.
The HW Prototype 12 has come out in the following 1/64 scale versions:
|Col #||Year||Series||Color||Tampo||Base Color / Type||Window Color||Interior Color||Wheel Type||Toy #||Country||Notes||Photo|
|036||2002||2002 First Editions #24||Metalflake Dark Orange||Silver headlight tampos||Unpainted / Metal||Purple tint||Gray||PR5||Malaysia|
|143||2003||Track Aces #2||Metaflake Orange||yellow/black/white/orange tampos||Unpainted / Metal||Clear||Gray||PR5||Malaysia|
|192||2004||Track Aces Series||White||Clear||PR5|
|2/2||2006||3 Kings Car||Metallic Silver||Dark Red and Gold flaming rally stripes||Unpainted / Metal||Clear||Red||5SP||L3728||Malaysia|
|2008||Top Speed GT 5-Pack||Metalflake Red||"4" with Black, White and Gold racing tampos||Unpainted / Metal||Clear||Tan||5SP||L9969||Malaysia|
|2008||Metallic Red||"4" with Black, White and Gold racing tampos. Bottom side stamp B12||Unpainted / Metal||Clear||Tan||5SP||Thailand|
|2010||Rock 'N' Road 5-Pack||White and transparent Dark Blue||Orange and Lime Green strips, "HW PROTOTYPE " Motorsports, "12" and Hot Wheels Logo & "Leeway Motorsports"||Black / Plastic||Blue||White||PR5||R7661||Thailand|
|N/A||2012||Max Steel : Core Overload 5 pack||X1111|
|N/A||2016||2016 Mystery Models #05||Orange||Black, Green, White, and Light Orange around '12'||Unpainted / Metal||Purple tint||Black||PR5||Y8127||Malaysia|
- HW Prototype 12 is the Prototype car Dr. Peter Justice had desgined in Hot Wheels: Velocity X. The car's speed was capable of bending the light around it to make it look invisible, and could also be used for time travel. Otto Von Diesel, however, stole the car and Dr. Justice had his son Max disable and retrieve it.
- Its color in this game follows a similar color to the 2002 First Editions variant.
- It is also the fastest car in the game, with a regular top speed of 184 mph (296 km/h).