It's not talking about the torsion bars that are in the suspension. There is a torsion bar in the valve assembly on the gear. That's what directs pressure one way or the other depending on steering input.
The post was really about the hilariously wrong stock photo they put at the bottom of their graphic. Zoom in and take a look.
Apparently my "torsion bars are just a little too long to fit" was too subtle a joke. :)
