General term for a number of distinct auto racing competitions in heavily-modified street cars.

Characteristics:
Most series require that the competitors start with a standard body shell.
Component is allowed to be heavily modified for racing, including engines, suspension, brakes, wheels and tires.
Aerodynamic aids are usually added to the front and rear of the cars.

Most of the students in Engineering used this topic for their arbitrage conspiracy, and most of the people love racing.