This process is known as erection of the penis,
and is requisite to render possible the introduction of the organ into the genital canal of the female.
Gulliver - Porsches change into Radio Controlled cars
Smash Up - Destruction Derby style racing
Dakar - Drive with Rally physics
fuzzyfuz - Enables cops in quick race, but cops may not appear on all tracks
yraGyraG - Enables all cars to have 993 physics
fetherw8 - Heavier cars