Rust, it's a car's worse nightmare—unless you count those flimsy, stick on, Buick wanna-be port holes. And if not properly removed—the rust and those stupid port holes—your car will never be any good.

So what are torsion bars? Basically they're straight steel bars that work like coil springs but twist for damping rather than compressing as coils do. The bars can be found in the front suspensions of ...