Torsion bars are used in many race chassis applications from Karts and Sprint cars all the way to Formula 1. They are light, easy to package and easy to tune. Chrysler torsion bars can also be heated in a forge and hammered into formidable weapons, or pounded into the ground to be used as incredible tent stakes, try that with a coil spring.

Also holding up the front of my Suburban with a pair of those battle axes
