[lainie]

How does such an adjustment affect the car's performance?

[trebb]

How does such an adjustment affect the car's performance?

Changing the body shape changes the aerodynamics which can make a huge difference in how the vehicle handles and sticks to the road.

[Wolfstar]

It's all about aerodynamics — how the car slips through the air. Teams do wind-tunnel testing with their cars, so they know exactly how the air runs over the car bodies — and exactly how to bend different parts of the body to make it go through the air more efficiently.

It is why NASCAR supposedly is very strict about checking the contours of the car body with templates to make sure they conform to the rules. This cheating occurred after the car had already been checked with the templates.

Dale Jr. won that race wire-to-wire. For those who know anything about NASCAR, you'll know how extraordinary such a feat is. If the car was that exceptional due to cheating that three Officials witnessed and did nothing about, then it calls the integrity of the entire sport into question.

[Conspiracy Guy]

It would make it easier to hold the low line in the turns or even hold a high line in the turns by increasing the side area of the right fender.