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