TUNINGGGGGG>>>>>>........

Car tuning is both an industry and a popular hobby, in which a car is modified in order to improve its performance and handling and improve the owner's driving style. As most cars leave the factory set up for average driver expectations and average conditions, tuning has become a way to personalize the characteristics of the vehicle to the owner's preference. For example cars may be altered to provide better fuel economy, produce more power at high RPM or the ride comfort may be sacrificed to provide better handling.

Car tuning is related to auto racing, although most performance cars never compete. Rather they are built for the pleasure of owning and driving such a vehicle. Another major facet of tuning includes performance modification to the car exterior. This includes changing the aerodynamic characteristics of the vehicle via side skirts, front and rear bumpers, adding spoilers, splitters, air vents and light weight wheels

Before we go, I decided to write down a few lines about nitrous oxide so things will be more clear while reading the article.
First of all, Nitrous Oxide is not a fuel (Yes, that's true, we will talk about this later on)
Nitrous is not flamable, thus, the scene which Brian shouts in Fast & the Furious "NOOsSSS!!" and the green Mitsubishi explodes is not impossible.
Using the term "NOS" is completely wrong, because NOS is the name of a company, just like MOMO, SPARCO or APEXI. The right term would be "Nitrous Oxide".
The combustion & engine power basics
We all know that combustion takes place by mixing air and fuel at the combustion chamber. An engine operates by burning fuel, which then pushes the pistons down. Want to make more horsepower? Burn more fuel so it will push the pistons down with more force. This is what we need for generating more power in an engine, but it will be impossible to generate this power without extra oxygen. From our chemistry and physics lessons, we all remember that we need oxygen in order to burn the fuel. Nitrous oxide systems make additional horsepower by allowing an engine to burn more fuel than it could normally do.
Nitrous Oxide
Nitrous Oxide is a colorless, odorless & non-flammable gas composed of 2 nitrogen and 1 oxygen atoms. That's where N20 comes from. It has a slightly sweet taste and odor. It is non-toxic and non-irritating and when inhaled in small quantities can produce mild hysteria and giggling or laughter.