Modified cars Common upgrades

Common upgrades include replacing the standard factory issue wheels with after market alloy wheels, usually of a larger diameter to improve the aesthetics; lowering the suspension of the car to give it a "quick" look by replacing the springs (and sometimes shock absorbers too) or torsion bars; replacing the existing exhaust system with one with less restriction allowing better exhaust flow, louder and deeper sound and possible improvements in performance (due to easier flow rate).

Going further with a modified car could involve adding a fiberglass body kit to improve the aesthetics, changing the paint to a more novel color or increasing the engine performance with a high-flow air filter, port and polish or even forced induction, such as a turbocharger kit. Aside from the use of body kits, traditional customizing methods like roof chops, two door stretches, suicide doors, channeling and lights, trim and sheet metal from another car and sectioning are sometimes also used.

Simple accessories or audio upgrades, although technically still a modification, are so common place with car owners in general they aren’t classed as such. Replacing a radio cassette player with a CD player or adding fabric seat covers fall into this category.