Anti-roll bar

Sometimes called the "anti-sway bar", "stabilizer bar", or even (incorrectly) "roll-bar". It is usually a round bar which connects the left wheel suspension assembly with the right side. It may be found at the front and/or rear. Its main function is to keep both wheels rolling at the same rate when meeting bumps; but it also affects handling. A front anti-roll bar increases understeer and a rear bar increases oversteer.