Some autoX rules prohibit changes to the rear sway bar so to get around this racers take the front sway out for increased oversteer.

The four point bar connects at the four upper control arm mounting bolts. Would that constitute an alteration to the chassis? Maybe.

joebenz,

This is the simplified version:

The key is to maintain a certain ratio between the front and rear sway bars (in relation to your spring and damping rates on your shocks) so you can have oversteer, understeer or neutral handling, depending on your preference. Once you have that you can increase your sway bars thickness' in keeping with that ratio, to eliminate body roll. The US version of the Type-R has 24mm on the front and 22mm on the rear to give it close to neutral steering (in conjunction with it's spring and damping).