Lamborghini Centenario R&D Mini Kit Box

The Lamborghini Centenario R&D Mini Kit Box is a Pro Kit Box in Asphalt 8: Airborne. It has taken over the concept of event Mini Boxes from the McLaren Championships and is available exclusively during the Lamborghini Centennario R&D event.
Unlike the which grants almost no engine card at all, this box seems to grant at least 1 V12 MPI Engine in (almost!) every box.
== Availabilty ==
The box was not offered again in the January 2020 rerun of the event. Therefore it has to be considered as discontinued as there are no other ways to obtain it.
== Analysis ==
The drop rate of legendary cards in this box was increased from to around June 2019. It is unclear whether this means a higher drop rate of V12 MPI Engines. The last box of the sample in the infobox to the right was opened in January 2020 when the box was already discontinued. It contained 1 V12 MPI Engine and 2 Advanced Tech cards and is not listed in the table below. 
=== Probabilities ===
If it was assumed that
# the probabilities of Advanced Tech and V12 MPI Engines (both legendary) were equal and
# there could be only 1 V12 MPI Engine per Mini Box,
the chance of getting a V12 MPI Engine from a box would be
: 45 \% : 2 = 22.5 \%.
If a player bought 5 Mini Boxes, the chance of getting at least 1 V12 MPI Engine would be
: 
\begin{align}
 &\sum_{k = 1}^{5} 0.225^k \cdot \left (1 - 0.225 \right )^{5-k} \cdot \binom{5}{k}\\
\\
\\
 &= 72.04 \%.
\end{align}
The amount n of boxes needed to get at least 1 V12 MPI Engine with a probability of would be
:n \geq \frac{\ln(1 - 0.9)}{\ln(1 - 0.225)} = 9.03 > 9.
=== Statistics ===
Opening 5 Mini boxes delivered the following results:
V12 MPI	x55pxAdvanced Tech	x55pxMid-Tech	x55pxTires	x55pxSuspension	x55pxDrivetrain	x55pxExhaust
1 	 	1 	1 	 	 	
1 	1 	 	 	1 	 	
2 	 	 	1 	 	 	
1 	 	 	 	1 	 	1
 	1 	 	1 	 	 	1
As some players obtained more than 1 engine from a box and nearly every opened box contained at least 1 engine, both of the above assumptions were false which leads to the following conclusions:
* While the official drop rate of for items is correct, the probabilites for V12 MPI Eninges and Advanced Tech are not equal.
* The probability of getting at least 1 V12 MPI Engine seems to be around .