A boosting system for cars which can work in combination with a blow off valve, intercooler, and various other add-ons. To install a turbo in a car with any sort of decent boost (8 pound +) many modifications need to be made to operate it safely such as disc brakes (if you use ordinary brake pads you will warp them and end up with screeching metal on metal). The power of the turbo is measured in p.s.i. or pounds per square inch, and cars that come standard with turbo's are usually between 2 p.s.i. (usually on luxury cars like Saab's etc) and as high as around 12p.s.i (Skyline's etc). Turbo's are a good way to increase the speed and kilowatts of your car but are expensive to insure.