This is part of a Summer Event.
If used during the Summer, you get 50% extra cash and XP from races.
|Six Four Plus Three|
|Six Four variant|
The Six Four Plus Three could be obtained either by completing the Add That Up achievement, which required you to use 2,000 nitros with a summer car, during the 2015 Summer Event or by purchasing it in the dealership during the 2016 Summer Event.
- Towards the end of the 2016 Summer Event (with an upgraded to the Y.A.C.H.T., it was also made available via the dealership. However, its price was increased from $1,500,000 to a whopping $20,000,000, making tied for the second most expensive car in Nitro Type history, tied with Mercedex McLaro SLR 12.5)
- This car is the first and so far only car to feature more than one person inside it.
- This is the car that iloveshoes2 used to complete her 125,000th race.
- This is the only summer car in the 2016 Summer Event besides the '13 Summer Classic to not be a boat.