Bent metal tubing is used in a variety of applications, not just the racing industry. But in racing, every detail matters when it comes to crossing the finish line first.
There are very few, if any, people that bend tubes and nail a perfect bend on the first tube after a new setup. Because it seems that no matter how many times you have set up a machine to run a given tube size, material type, wall thickness, etc., most of the time you find yourself adjusting to get it just right.
Drag Racing is an exciting branch of car racing. Race cars are designed for extreme speed and drivers are trained to keep the car as straight as possible. The engineering that goes into the top vehicles is the most highly tuned engineering in the business.
The importance of the camshaft to an engine cannot be overemphasized. Only a camshaft can alter the performance of an engine. Usually, there are specific mathematical rules that are used to calculate the camshaft.