Originally Posted by The Twin
brought it sideways under super hard cornering...
...fatter rear sways which may also help out the stability on the back end.
Adding a stiffer rear sway bar helps out with the dorifto oversteer when cornering, not really with stability because you're actually reducing rear traction by stiffening the rear sway bar. When you have stiff enough rear springs there's almost no need for a rear sway bar... I've heard of guys who run no rear sway bar on their track cars for this reason.