Tuning

An aggressive body kit can make a car look lower and wider yet make it less aerodynamically efficient. Extra width can increase frontal area, and a large

Sharper turn-in and less body roll are the main attractions of an adjustable sway bar. A correctly chosen setting can make steering response more immediate

A manual boost controller is simpler and usually cheaper. An electronic unit can hold boost more consistently as temperature, altitude, and load change

A car that turns willingly in one direction and pushes wide in the other may have more than a tire or alignment problem. Unequal static wheel loads can

A lighter car can feel more alert under braking, through a corner, and when you accelerate out of it. Reducing mass also improves its power-to-weight ratio

Choosing between a wet and dry nitrous kit is mainly a decision about where the additional fuel comes from and how much responsibility remains with the

Choosing a supercharger kit is a decision about power delivery and system reliability, not simply the largest number in an advertisement.

The choice often starts with an affordable fixed drop or the ability to adjust ride height. Lowering springs make sense if you know where you want the

An extreme drop can look right at a show and feel wrong on the road. As the car settles, it may lose usable damper stroke, move its suspension geometry

A large rear wing often looks more functional than a small spoiler. On a road car, however, the smaller device may deliver the more useful compromise