A recent video from the Brick Technology channel on YouTube is special for many reasons. It is a highly advanced Lego brick car that is not an official build and makes use of all kinds of Technic parts. The level of sophistication is frankly astounding.
The author of the build wanted to recreate the car of the Flintstones family from the animated series of the same name. He put steamroller-style cylinders in place of wheels and implemented functional lighting, AWD drivetrain, handling and suspension.
Make sure you watch the entire video where the host explains which custom parts he had to use in the project to make the toy car as agile and fast as it is.