Progress 24mm Anti Roll Bar kit. Progress Anti-Roll Bars improve lateral stability without stiffening normal suspension movement. Anti-roll bars minimise body roll, which stabilises the tire contact patch for maximum traction. That’s important because all of the weight and power of your vehicle is transmitted to the road over a mere handful of square inches called the tyre contact patch. Most fwd road cars have moderate understeer. The sway bars are designed to improve overall balance by the use of proportionately stiffer rear bars giving the car a “neutral” feel, with a gentle understeer at its limits. The progress 24mm rear Anti roll bar comes with a silver coated tie bar, 24mm roll bar, rose jointed drop links and two point adjustment. Easy to fit yourself and comes with full fitting instructions.