I have recently started building 4-wide limos. Here is the second limo I have done, after my Bullet Run limo. (BTW, there is a HotWheels car named the "Limo-Zeen," but I just really liked the name for my MOC) It has been designed with very many Lambo Murcielago styling cues, especially in the rear end. The tailights look a lot like those of a Lambo, and between the tailights is a vent. The rear cover lifts to reveal a large engine, that gives this monstrosity of an exotic to high speeds, with quick acceleration. It has dual center pipes in the rear. I have used the smaller axles, to allow the wheels to fit within the fender wells. Although there aren't many resemblances to the Lambo on the front of the car.
I think yellow fits in real well. I just made a Dodge Ram 1500. I Limo-see things in professional for you in the future. I will now turn off my crystal ball...