The Lamborghini Aventador LP700-4 and the Huracán LP610-4 both get Liberty Walk Widebody Kit Conversions in FH5 but they both have inconsistent Aero Tuning Unlocks.
The Lamborghini Aventador gets Rear Aero Tuning due to the Large Wing but it does not get Front Downforce Tuning from the Bodykit.
The Kit
The Tuning Menu after it is applied
On the other hand the Huracán gets no Adjustable Rear Downforce due to the lack of a proper Wing but then the Bodykit does get Front Downforce Tuning.
The Kit
The Tuning Menu
I don’t think the Huracán necessarily needs Rear Tuning as the Wing is just a Ducktail but I definitely think the Aventador needs Front Downforce Tuning Unlocked to be more consistent with the Huracán and also provide a much needed Buff to handling as the car itself is pretty terrible.