What-4 was a car in the 1971 Hot Wheels series.

VersionsEdit

Rocket Bye Baby 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 / Variations	Photo
6001	1971	1971 Hot Wheels	Spectraflame Aqua					RL
6001	1971	1971 Hot Wheels	Spectraflame Blue					RL
6001	1971	1971 Hot Wheels	Spectraflame Gold					RL
6001	1971	1971 Hot Wheels	Spectraflame Green					RL
6001	1971	1971 Hot Wheels	Spectraflame Red					RL
6001	1971	1971 Hot Wheels	Spectraflame Magenta					RL
6001	1971	1971 Hot Wheels	Spectraflame Purple					RL